diff --git a/src/plugins/fresco/ImagesSidebar.js b/src/plugins/fresco/ImagesSidebar.js
index 20b47c6cb..0c20dc72c 100644
--- a/src/plugins/fresco/ImagesSidebar.js
+++ b/src/plugins/fresco/ImagesSidebar.js
@@ -112,6 +112,15 @@ class EventDetails extends Component<{
             setValue={function(path: Array<string>, val: any) {}}
           />
         </p>
+        <p>
+          <DataDescriptionKey>Requested on cold start</DataDescriptionKey>
+          <span key="sep">: </span>
+          <DataDescription
+            type="number"
+            value={event.coldStart}
+            setValue={function(path: Array<string>, val: any) {}}
+          />
+        </p>
         {this.renderViewportData()}
       </EventDetails.Container>
     );
diff --git a/src/plugins/fresco/api.js b/src/plugins/fresco/api.js
index dcfbb79e0..3500e66fd 100644
--- a/src/plugins/fresco/api.js
+++ b/src/plugins/fresco/api.js
@@ -58,6 +58,7 @@ export type ImageEvent = {
   startTime: Timestamp,
   endTime: Timestamp,
   source: string,
+  coldStart: number,
   viewport?: ViewportData, // not set for prefetches
 };