diff --git a/packages/core/src/awsService/cloudWatchLogs/commands/tailLogGroup.ts b/packages/core/src/awsService/cloudWatchLogs/commands/tailLogGroup.ts
index 74ac67fca33..6a41025be71 100644
--- a/packages/core/src/awsService/cloudWatchLogs/commands/tailLogGroup.ts
+++ b/packages/core/src/awsService/cloudWatchLogs/commands/tailLogGroup.ts
@@ -27,7 +27,7 @@ export async function tailLogGroup(
     }
 
     const liveTailSessionConfig: LiveTailSessionConfiguration = {
-        logGroupName: wizardResponse.regionLogGroupSubmenuResponse.data,
+        logGroupArn: wizardResponse.regionLogGroupSubmenuResponse.data,
         logStreamFilter: wizardResponse.logStreamFilter,
         logEventFilterPattern: wizardResponse.filterPattern,
         region: wizardResponse.regionLogGroupSubmenuResponse.region,
diff --git a/packages/core/src/awsService/cloudWatchLogs/registry/liveTailSession.ts b/packages/core/src/awsService/cloudWatchLogs/registry/liveTailSession.ts
index bb9aafe68db..e1e67be2a0b 100644
--- a/packages/core/src/awsService/cloudWatchLogs/registry/liveTailSession.ts
+++ b/packages/core/src/awsService/cloudWatchLogs/registry/liveTailSession.ts
@@ -9,13 +9,13 @@ import {
     StartLiveTailResponseStream,
 } from '@aws-sdk/client-cloudwatch-logs'
 import { LogStreamFilterResponse } from '../wizard/liveTailLogStreamSubmenu'
-import { CloudWatchLogsSettings } from '../cloudWatchLogsUtils'
-import { convertToTimeString, globals, Settings, ToolkitError } from '../../../shared'
+import { CloudWatchLogsSettings, uriToKey } from '../cloudWatchLogsUtils'
+import { convertToTimeString, getLogger, globals, Settings, ToolkitError } from '../../../shared'
 import { createLiveTailURIFromArgs } from './liveTailSessionRegistry'
 import { getUserAgent } from '../../../shared/telemetry/util'
 
 export type LiveTailSessionConfiguration = {
-    logGroupName: string
+    logGroupArn: string
     logStreamFilter?: LogStreamFilterResponse
     logEventFilterPattern?: string
     region: string
@@ -28,7 +28,7 @@ export type LiveTailSessionClient = {
 
 export class LiveTailSession {
     private liveTailClient: LiveTailSessionClient
-    private _logGroupName: string
+    private _logGroupArn: string
     private logStreamFilter?: LogStreamFilterResponse
     private logEventFilterPattern?: string
     private _maxLines: number
@@ -45,7 +45,7 @@ export class LiveTailSession {
     static settings = new CloudWatchLogsSettings(Settings.instance)
 
     public constructor(configuration: LiveTailSessionConfiguration) {
-        this._logGroupName = configuration.logGroupName
+        this._logGroupArn = configuration.logGroupArn
         this.logStreamFilter = configuration.logStreamFilter
         this.liveTailClient = {
             cwlClient: new CloudWatchLogsClient({
@@ -69,8 +69,8 @@ export class LiveTailSession {
         return this._uri
     }
 
-    public get logGroupName() {
-        return this._logGroupName
+    public get logGroupArn() {
+        return this._logGroupArn
     }
 
     public set eventRate(rate: number) {
@@ -93,6 +93,7 @@ export class LiveTailSession {
         this.statusBarUpdateTimer = globals.clock.setInterval(() => {
             this.updateStatusBarItemText()
         }, 500)
+        getLogger().info(`LiveTail session started: ${uriToKey(this.uri)}`)
         return commandOutput.responseStream
     }
 
@@ -130,7 +131,7 @@ export class LiveTailSession {
         }
 
         return new StartLiveTailCommand({
-            logGroupIdentifiers: [this.logGroupName],
+            logGroupIdentifiers: [this.logGroupArn],
             logStreamNamePrefixes: logStreamNamePrefix ? [logStreamNamePrefix] : undefined,
             logStreamNames: logStreamName ? [logStreamName] : undefined,
             logEventFilterPattern: this.logEventFilterPattern ? this.logEventFilterPattern : undefined,
diff --git a/packages/core/src/awsService/cloudWatchLogs/registry/liveTailSessionRegistry.ts b/packages/core/src/awsService/cloudWatchLogs/registry/liveTailSessionRegistry.ts
index 3d5bc5c59a8..988725edc87 100644
--- a/packages/core/src/awsService/cloudWatchLogs/registry/liveTailSessionRegistry.ts
+++ b/packages/core/src/awsService/cloudWatchLogs/registry/liveTailSessionRegistry.ts
@@ -19,7 +19,7 @@ export class LiveTailSessionRegistry extends Map<string, LiveTailSession> {
 }
 
 export function createLiveTailURIFromArgs(sessionData: LiveTailSessionConfiguration): vscode.Uri {
-    let uriStr = `${cloudwatchLogsLiveTailScheme}:${sessionData.region}:${sessionData.logGroupName}`
+    let uriStr = `${cloudwatchLogsLiveTailScheme}:${sessionData.region}:${sessionData.logGroupArn}`
 
     if (sessionData.logStreamFilter) {
         if (sessionData.logStreamFilter.type !== 'all') {
diff --git a/packages/core/src/awsService/cloudWatchLogs/wizard/tailLogGroupWizard.ts b/packages/core/src/awsService/cloudWatchLogs/wizard/tailLogGroupWizard.ts
index c0ba4bdc3af..cc07bc71961 100644
--- a/packages/core/src/awsService/cloudWatchLogs/wizard/tailLogGroupWizard.ts
+++ b/packages/core/src/awsService/cloudWatchLogs/wizard/tailLogGroupWizard.ts
@@ -4,7 +4,7 @@
  */
 
 import * as nls from 'vscode-nls'
-import { ToolkitError } from '../../../shared'
+import { globals, ToolkitError } from '../../../shared'
 import { DefaultCloudWatchLogsClient } from '../../../shared/clients/cloudWatchLogsClient'
 import { cwlFilterPatternHelpUrl } from '../../../shared/constants'
 import { createBackButton, createExitButton, createHelpButton } from '../../../shared/ui/buttons'
@@ -29,7 +29,7 @@ export class TailLogGroupWizard extends Wizard<TailLogGroupWizardResponse> {
             initState: {
                 regionLogGroupSubmenuResponse: logGroupInfo
                     ? {
-                          data: logGroupInfo.groupName,
+                          data: buildLogGroupArn(logGroupInfo.groupName, logGroupInfo.regionName),
                           region: logGroupInfo.regionName,
                       }
                     : undefined,
@@ -81,6 +81,19 @@ async function getLogGroupQuickPickOptions(regionCode: string): Promise<DataQuic
     return logGroupsOptions
 }
 
+export function buildLogGroupArn(logGroupName: string, region: string): string {
+    if (logGroupName.startsWith('arn:')) {
+        return logGroupName
+    }
+    const awsAccountId = globals.awsContext.getCredentialAccountId()
+    if (awsAccountId === undefined) {
+        throw new ToolkitError(
+            `Failed to construct Arn for LogGroup because awsAccountId is undefined. LogGroup: ${logGroupName}`
+        )
+    }
+    return `arn:aws:logs:${region}:${awsAccountId}:log-group:${logGroupName}`
+}
+
 function formatLogGroupArn(logGroupArn: string): string {
     return logGroupArn.endsWith(':*') ? logGroupArn.substring(0, logGroupArn.length - 2) : logGroupArn
 }
diff --git a/packages/core/src/test/awsService/cloudWatchLogs/commands/tailLogGroup.test.ts b/packages/core/src/test/awsService/cloudWatchLogs/commands/tailLogGroup.test.ts
index e364c70ce34..e6a8dff30aa 100644
--- a/packages/core/src/test/awsService/cloudWatchLogs/commands/tailLogGroup.test.ts
+++ b/packages/core/src/test/awsService/cloudWatchLogs/commands/tailLogGroup.test.ts
@@ -20,11 +20,13 @@ import {
 import { getTestWindow } from '../../../shared/vscode/window'
 import { CloudWatchLogsSettings, uriToKey } from '../../../../awsService/cloudWatchLogs/cloudWatchLogsUtils'
 import { installFakeClock } from '../../../testUtil'
+import { DefaultAwsContext } from '../../../../shared'
 
 describe('TailLogGroup', function () {
     const testLogGroup = 'test-log-group'
     const testRegion = 'test-region'
     const testMessage = 'test-message'
+    const testAwsAccountId = '1234'
 
     let sandbox: sinon.SinonSandbox
     let registry: LiveTailSessionRegistry
@@ -54,6 +56,7 @@ describe('TailLogGroup', function () {
     })
 
     it('starts LiveTailSession and writes to document. Closes tab and asserts session gets closed.', async function () {
+        sandbox.stub(DefaultAwsContext.prototype, 'getCredentialAccountId').returns(testAwsAccountId)
         wizardSpy = sandbox.stub(TailLogGroupWizard.prototype, 'run').callsFake(async function () {
             return getTestWizardResponse()
         })
@@ -127,7 +130,7 @@ describe('TailLogGroup', function () {
             })
 
         const session = new LiveTailSession({
-            logGroupName: testLogGroup,
+            logGroupArn: testLogGroup,
             region: testRegion,
         })
         registry.set(uriToKey(session.uri), session)
@@ -140,7 +143,7 @@ describe('TailLogGroup', function () {
 
     it('clearDocument clears all text from document', async function () {
         const session = new LiveTailSession({
-            logGroupName: testLogGroup,
+            logGroupArn: testLogGroup,
             region: testRegion,
         })
         const testData = 'blah blah blah'
diff --git a/packages/core/src/test/awsService/cloudWatchLogs/registry/liveTailRegistry.test.ts b/packages/core/src/test/awsService/cloudWatchLogs/registry/liveTailRegistry.test.ts
index 17ec44e0c07..63cd5867998 100644
--- a/packages/core/src/test/awsService/cloudWatchLogs/registry/liveTailRegistry.test.ts
+++ b/packages/core/src/test/awsService/cloudWatchLogs/registry/liveTailRegistry.test.ts
@@ -15,7 +15,7 @@ describe('LiveTailSession URI', async function () {
 
     it('is correct with no logStream filter, no filter pattern', function () {
         const config: LiveTailSessionConfiguration = {
-            logGroupName: testLogGroupName,
+            logGroupArn: testLogGroupName,
             region: testRegion,
         }
         const expectedUri = vscode.Uri.parse(expectedUriBase)
@@ -25,7 +25,7 @@ describe('LiveTailSession URI', async function () {
 
     it('is correct with no logStream filter, with filter pattern', function () {
         const config: LiveTailSessionConfiguration = {
-            logGroupName: testLogGroupName,
+            logGroupArn: testLogGroupName,
             region: testRegion,
             logEventFilterPattern: 'test-filter',
         }
@@ -36,7 +36,7 @@ describe('LiveTailSession URI', async function () {
 
     it('is correct with ALL logStream filter', function () {
         const config: LiveTailSessionConfiguration = {
-            logGroupName: testLogGroupName,
+            logGroupArn: testLogGroupName,
             region: testRegion,
             logStreamFilter: {
                 type: 'all',
@@ -49,7 +49,7 @@ describe('LiveTailSession URI', async function () {
 
     it('is correct with prefix logStream filter', function () {
         const config: LiveTailSessionConfiguration = {
-            logGroupName: testLogGroupName,
+            logGroupArn: testLogGroupName,
             region: testRegion,
             logStreamFilter: {
                 type: 'prefix',
@@ -63,7 +63,7 @@ describe('LiveTailSession URI', async function () {
 
     it('is correct with specific logStream filter', function () {
         const config: LiveTailSessionConfiguration = {
-            logGroupName: testLogGroupName,
+            logGroupArn: testLogGroupName,
             region: testRegion,
             logStreamFilter: {
                 type: 'specific',
@@ -77,7 +77,7 @@ describe('LiveTailSession URI', async function () {
 
     it('is correct with specific logStream filter and filter pattern', function () {
         const config: LiveTailSessionConfiguration = {
-            logGroupName: testLogGroupName,
+            logGroupArn: testLogGroupName,
             region: testRegion,
             logStreamFilter: {
                 type: 'specific',
diff --git a/packages/core/src/test/awsService/cloudWatchLogs/wizard/tailLogGroupWizard.test.ts b/packages/core/src/test/awsService/cloudWatchLogs/wizard/tailLogGroupWizard.test.ts
index 137b372438e..e3dde5f96cf 100644
--- a/packages/core/src/test/awsService/cloudWatchLogs/wizard/tailLogGroupWizard.test.ts
+++ b/packages/core/src/test/awsService/cloudWatchLogs/wizard/tailLogGroupWizard.test.ts
@@ -2,11 +2,28 @@
  * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
  * SPDX-License-Identifier: Apache-2.0
  */
+import * as sinon from 'sinon'
 
-import { TailLogGroupWizard } from '../../../../awsService/cloudWatchLogs/wizard/tailLogGroupWizard'
+import assert from 'assert'
+import { buildLogGroupArn, TailLogGroupWizard } from '../../../../awsService/cloudWatchLogs/wizard/tailLogGroupWizard'
 import { createWizardTester } from '../../../shared/wizards/wizardTestUtils'
+import { DefaultAwsContext } from '../../../../shared'
 
 describe('TailLogGroupWizard', async function () {
+    let sandbox: sinon.SinonSandbox
+
+    const testLogGroupName = 'testLogGroup'
+    const testRegion = 'testRegion'
+    const testAwsAccountId = '1234'
+
+    beforeEach(function () {
+        sandbox = sinon.createSandbox()
+    })
+
+    afterEach(function () {
+        sandbox.restore()
+    })
+
     it('prompts regionLogGroup submenu first if context not provided', async function () {
         const wizard = new TailLogGroupWizard()
         const tester = await createWizardTester(wizard)
@@ -16,13 +33,20 @@ describe('TailLogGroupWizard', async function () {
     })
 
     it('skips regionLogGroup submenu if context provided', async function () {
+        sandbox.stub(DefaultAwsContext.prototype, 'getCredentialAccountId').returns(testAwsAccountId)
         const wizard = new TailLogGroupWizard({
-            groupName: 'test-groupName',
-            regionName: 'test-regionName',
+            groupName: testLogGroupName,
+            regionName: testRegion,
         })
         const tester = await createWizardTester(wizard)
         tester.regionLogGroupSubmenuResponse.assertDoesNotShow()
         tester.logStreamFilter.assertShowFirst()
         tester.filterPattern.assertShowSecond()
     })
+
+    it('builds LogGroup Arn properly', async function () {
+        sandbox.stub(DefaultAwsContext.prototype, 'getCredentialAccountId').returns(testAwsAccountId)
+        const arn = buildLogGroupArn(testLogGroupName, testRegion)
+        assert.strictEqual(arn, `arn:aws:logs:${testRegion}:${testAwsAccountId}:log-group:${testLogGroupName}`)
+    })
 })