diff --git a/src/libs/actions/Report.js b/src/libs/actions/Report.js
index bd4f48b717b3..98eff9e3ecf1 100644
--- a/src/libs/actions/Report.js
+++ b/src/libs/actions/Report.js
@@ -21,6 +21,7 @@ import * as ReportActionsUtils from '../ReportActionsUtils';
 import * as CollectionUtils from '../CollectionUtils';
 import * as EmojiUtils from '../EmojiUtils';
 import * as ErrorUtils from '../ErrorUtils';
+import * as UserUtils from '../UserUtils';
 import * as Welcome from './Welcome';
 import * as PersonalDetailsUtils from '../PersonalDetailsUtils';
 
@@ -414,6 +415,23 @@ function openReport(reportID, participantLoginList = [], newReportObject = {}, p
             value: {[optimisticCreatedAction.reportActionID]: {pendingAction: null}},
         });
 
+        // Add optimistic personal details for new participants
+        const optimisticPersonalDetails = {};
+        _.map(participantLoginList, (login, index) => {
+            const accountID = newReportObject.participantAccountIDs[index];
+            optimisticPersonalDetails[accountID] = {
+                login,
+                accountID,
+                avatar: UserUtils.getDefaultAvatar(accountID),
+                displayName: login,
+            };
+        });
+        onyxData.optimisticData.push({
+            onyxMethod: Onyx.METHOD.MERGE,
+            key: ONYXKEYS.PERSONAL_DETAILS_LIST,
+            value: optimisticPersonalDetails,
+        });
+
         // Add the createdReportActionID parameter to the API call
         params.createdReportActionID = optimisticCreatedAction.reportActionID;