diff --git a/src/libs/OptionsListUtils.ts b/src/libs/OptionsListUtils.ts
index d1f5ca29b7cf..daf2cf608a66 100644
--- a/src/libs/OptionsListUtils.ts
+++ b/src/libs/OptionsListUtils.ts
@@ -106,6 +106,7 @@ import {
     isArchivedReport,
     isChatThread,
     isDefaultRoom,
+    isDM,
     isDraftReport,
     isExpenseReport,
     isHiddenForCurrentUser,
@@ -551,6 +552,23 @@ function getLastActorDisplayName(lastActorDetails: Partial<PersonalDetails> | nu
         : translateLocal('common.you');
 }
 
+/**
+ * Should show the last actor display name from last actor details.
+ */
+function shouldShowLastActorDisplayName(report: OnyxEntry<Report>, lastActorDetails: Partial<PersonalDetails> | null) {
+    if (!lastActorDetails || reportUtilsIsSelfDM(report) || (isDM(report) && lastActorDetails.accountID !== currentUserAccountID)) {
+        return false;
+    }
+
+    const lastActorDisplayName = getLastActorDisplayName(lastActorDetails);
+
+    if (!lastActorDisplayName) {
+        return false;
+    }
+
+    return true;
+}
+
 /**
  * Update alternate text for the option when applicable
  */
@@ -868,8 +886,11 @@ function createOption(
         let lastMessageText = lastMessageTextFromReport;
 
         const lastAction = lastVisibleReportActions[report.reportID];
-        const shouldDisplayLastActorName = lastAction && lastAction.actionName !== CONST.REPORT.ACTIONS.TYPE.REPORT_PREVIEW && lastAction.actionName !== CONST.REPORT.ACTIONS.TYPE.IOU;
-
+        const shouldDisplayLastActorName =
+            lastAction &&
+            lastAction.actionName !== CONST.REPORT.ACTIONS.TYPE.REPORT_PREVIEW &&
+            lastAction.actionName !== CONST.REPORT.ACTIONS.TYPE.IOU &&
+            shouldShowLastActorDisplayName(report, lastActorDetails);
         if (shouldDisplayLastActorName && lastActorDisplayName && lastMessageTextFromReport) {
             lastMessageText = `${lastActorDisplayName}: ${lastMessageTextFromReport}`;
         }
@@ -2314,6 +2335,7 @@ export {
     getIsUserSubmittedExpenseOrScannedReceipt,
     getManagerMcTestParticipant,
     isSelectedManagerMcTest,
+    shouldShowLastActorDisplayName,
 };
 
 export type {Section, SectionBase, MemberForList, Options, OptionList, SearchOption, PayeePersonalDetails, Option, OptionTree, ReportAndPersonalDetailOptions, GetUserToInviteConfig};
diff --git a/src/libs/SidebarUtils.ts b/src/libs/SidebarUtils.ts
index 9e5e33ceaa15..bba8eda7d020 100644
--- a/src/libs/SidebarUtils.ts
+++ b/src/libs/SidebarUtils.ts
@@ -18,7 +18,7 @@ import {hasValidDraftComment} from './DraftCommentUtils';
 import localeCompare from './LocaleCompare';
 import {formatPhoneNumber} from './LocalePhoneNumber';
 import {translate, translateLocal} from './Localize';
-import {getLastActorDisplayName, getLastMessageTextForReport, getPersonalDetailsForAccountIDs} from './OptionsListUtils';
+import {getLastActorDisplayName, getLastMessageTextForReport, getPersonalDetailsForAccountIDs, shouldShowLastActorDisplayName} from './OptionsListUtils';
 import Parser from './Parser';
 import Performance from './Performance';
 import {getCleanedTagName, getPolicy} from './PolicyUtils';
@@ -89,7 +89,6 @@ import {
     isChatThread,
     isConciergeChatReport,
     isDeprecatedGroupDM,
-    isDM,
     isDomainRoom,
     isExpenseReport,
     isExpenseRequest,
@@ -517,7 +516,6 @@ function getOptionData({
     }
 
     const lastActorDisplayName = getLastActorDisplayName(lastActorDetails);
-
     let lastMessageTextFromReport = lastMessageTextFromReportProp;
     if (!lastMessageTextFromReport) {
         lastMessageTextFromReport = getLastMessageTextForReport(report, lastActorDetails, policy);
@@ -646,12 +644,11 @@ function getOptionData({
         if (!lastMessageText) {
             lastMessageText = formatReportLastMessageText(getWelcomeMessage(report, policy).messageText ?? translateLocal('report.noActivityYet'));
         }
-        if (isDM(report) && lastActorDisplayName !== translateLocal('common.you')) {
-            result.alternateText = formatReportLastMessageText(Parser.htmlToText(lastMessageText)) || formattedLogin;
+
+        if (shouldShowLastActorDisplayName(report, lastActorDetails)) {
+            result.alternateText = `${lastActorDisplayName}: ${formatReportLastMessageText(Parser.htmlToText(lastMessageText)) || formattedLogin}`;
         } else {
-            result.alternateText = lastActorDisplayName
-                ? `${lastActorDisplayName}: ${formatReportLastMessageText(Parser.htmlToText(lastMessageText)) || formattedLogin}`
-                : formatReportLastMessageText(Parser.htmlToText(lastMessageText)) || formattedLogin;
+            result.alternateText = formatReportLastMessageText(Parser.htmlToText(lastMessageText)) || formattedLogin;
         }
     }