diff --git a/spiffworkflow-frontend/src/components/ReactDiagramEditor.tsx b/spiffworkflow-frontend/src/components/ReactDiagramEditor.tsx
index eefaff829..82dddd4ad 100644
--- a/spiffworkflow-frontend/src/components/ReactDiagramEditor.tsx
+++ b/spiffworkflow-frontend/src/components/ReactDiagramEditor.tsx
@@ -68,6 +68,7 @@ type OwnProps = {
   diagramType: string;
   readyOrWaitingProcessInstanceTasks?: Task[] | null;
   completedProcessInstanceTasks?: Task[] | null;
+  cancelledProcessInstanceTasks?: Task[] | null;
   saveDiagram?: (..._args: any[]) => any;
   onDeleteFile?: (..._args: any[]) => any;
   isPrimaryFile?: boolean;
@@ -94,6 +95,7 @@ export default function ReactDiagramEditor({
   diagramType,
   readyOrWaitingProcessInstanceTasks,
   completedProcessInstanceTasks,
+  cancelledProcessInstanceTasks,
   saveDiagram,
   onDeleteFile,
   isPrimaryFile,
@@ -358,7 +360,8 @@ export default function ReactDiagramEditor({
     function checkTaskCanBeHighlighted(taskBpmnId: string) {
       return (
         !taskSpecsThatCannotBeHighlighted.includes(taskBpmnId) &&
-        !taskBpmnId.match(/EndJoin/)
+        !taskBpmnId.match(/EndJoin/) &&
+        !taskBpmnId.match(/BoundaryEventParent/)
       );
     }
 
@@ -441,6 +444,19 @@ export default function ReactDiagramEditor({
           );
         });
       }
+      if (cancelledProcessInstanceTasks) {
+        const bpmnProcessIdentifiers = getBpmnProcessIdentifiers(
+          canvas.getRootElement()
+        );
+        cancelledProcessInstanceTasks.forEach((cancelledTask) => {
+          highlightBpmnIoElement(
+            canvas,
+            cancelledTask,
+            'cancelled-task-highlight',
+            bpmnProcessIdentifiers
+          );
+        });
+      }
     }
 
     function displayDiagram(
@@ -518,6 +534,7 @@ export default function ReactDiagramEditor({
     diagramXMLString,
     readyOrWaitingProcessInstanceTasks,
     completedProcessInstanceTasks,
+    cancelledProcessInstanceTasks,
     fileName,
     performingXmlUpdates,
     processModelId,
diff --git a/spiffworkflow-frontend/src/index.css b/spiffworkflow-frontend/src/index.css
index 077040363..e0b4336cd 100644
--- a/spiffworkflow-frontend/src/index.css
+++ b/spiffworkflow-frontend/src/index.css
@@ -142,6 +142,10 @@ code {
   fill: grey !important;
   opacity: .4;
 }
+.cancelled-task-highlight:not(.djs-connection) .djs-visual > :nth-child(1) {
+  fill: blue !important;
+  opacity: .2;
+}
 
 .accordion-item-label {
   vertical-align: middle;
diff --git a/spiffworkflow-frontend/src/interfaces.ts b/spiffworkflow-frontend/src/interfaces.ts
index 1d34054db..802c48c7d 100644
--- a/spiffworkflow-frontend/src/interfaces.ts
+++ b/spiffworkflow-frontend/src/interfaces.ts
@@ -58,6 +58,7 @@ export interface Task {
 export interface TaskIds {
   completed: Task[];
   readyOrWaiting: Task[];
+  cancelled: Task[];
 }
 
 export interface ProcessInstanceTask {
diff --git a/spiffworkflow-frontend/src/routes/ProcessInstanceShow.tsx b/spiffworkflow-frontend/src/routes/ProcessInstanceShow.tsx
index 29d4bedcb..c294ae486 100644
--- a/spiffworkflow-frontend/src/routes/ProcessInstanceShow.tsx
+++ b/spiffworkflow-frontend/src/routes/ProcessInstanceShow.tsx
@@ -231,13 +231,19 @@ export default function ProcessInstanceShow({ variant }: OwnProps) {
   };
 
   const getTaskIds = () => {
-    const taskIds: TaskIds = { completed: [], readyOrWaiting: [] };
+    const taskIds: TaskIds = {
+      completed: [],
+      readyOrWaiting: [],
+      cancelled: [],
+    };
     if (tasks) {
       tasks.forEach(function getUserTasksElement(task: Task) {
         if (task.state === 'COMPLETED') {
           taskIds.completed.push(task);
         } else if (task.state === 'READY' || task.state === 'WAITING') {
           taskIds.readyOrWaiting.push(task);
+        } else if (task.state === 'CANCELLED') {
+          taskIds.cancelled.push(task);
         }
         return null;
       });
@@ -1152,6 +1158,7 @@ export default function ProcessInstanceShow({ variant }: OwnProps) {
           fileName={processInstance.bpmn_xml_file_contents || ''}
           readyOrWaitingProcessInstanceTasks={taskIds.readyOrWaiting}
           completedProcessInstanceTasks={taskIds.completed}
+          cancelledProcessInstanceTasks={taskIds.cancelled}
           diagramType="readonly"
           onElementClick={handleClickedDiagramTask}
         />