diff --git a/.changeset/thirty-humans-knock.md b/.changeset/thirty-humans-knock.md
new file mode 100644
index 0000000000..47545af282
--- /dev/null
+++ b/.changeset/thirty-humans-knock.md
@@ -0,0 +1,5 @@
+---
+'@backstage/core': patch
+---
+
+Improve owner example value in `MissingAnnotationEmptyState`.
diff --git a/packages/core/src/components/EmptyState/MissingAnnotationEmptyState.tsx b/packages/core/src/components/EmptyState/MissingAnnotationEmptyState.tsx
index 377373a06d..6c04b34a90 100644
--- a/packages/core/src/components/EmptyState/MissingAnnotationEmptyState.tsx
+++ b/packages/core/src/components/EmptyState/MissingAnnotationEmptyState.tsx
@@ -30,7 +30,7 @@ metadata:
 spec:
   type: website
   lifecycle: production
-  owner: guest`;
+  owner: user:guest`;
 
 type Props = {
   annotation: string;
diff --git a/plugins/catalog-backend/src/ingestion/processors/util/parse.test.ts b/plugins/catalog-backend/src/ingestion/processors/util/parse.test.ts
index 4d6f67de22..1d8e139fb3 100644
--- a/plugins/catalog-backend/src/ingestion/processors/util/parse.test.ts
+++ b/plugins/catalog-backend/src/ingestion/processors/util/parse.test.ts
@@ -38,7 +38,7 @@ describe('parseEntityYaml', () => {
       spec:
         type: website
         lifecycle: production
-        owner: guest
+        owner: user:guest
     `,
           'utf8',
         ),
@@ -60,7 +60,7 @@ describe('parseEntityYaml', () => {
         spec: {
           type: 'website',
           lifecycle: 'production',
-          owner: 'guest',
+          owner: 'user:guest',
         },
       }),
     ]);
diff --git a/plugins/github-actions/README.md b/plugins/github-actions/README.md
index d47144351e..e1569f16ce 100644
--- a/plugins/github-actions/README.md
+++ b/plugins/github-actions/README.md
@@ -30,7 +30,7 @@ TBD
    spec:
      type: website
      lifecycle: production
-     owner: guest
+     owner: user:guest
    ```
 
 ### Standalone app requirements
diff --git a/plugins/github-actions/examples/sample.yaml b/plugins/github-actions/examples/sample.yaml
index a765bd395d..5b347388f7 100644
--- a/plugins/github-actions/examples/sample.yaml
+++ b/plugins/github-actions/examples/sample.yaml
@@ -9,4 +9,4 @@ metadata:
 spec:
   type: website
   lifecycle: production
-  owner: guest
+  owner: user:guest
diff --git a/plugins/kubernetes-backend/examples/dice-roller/catalog-info.yaml b/plugins/kubernetes-backend/examples/dice-roller/catalog-info.yaml
index a944232224..059b719563 100644
--- a/plugins/kubernetes-backend/examples/dice-roller/catalog-info.yaml
+++ b/plugins/kubernetes-backend/examples/dice-roller/catalog-info.yaml
@@ -10,4 +10,4 @@ metadata:
 spec:
   type: service
   lifecycle: production
-  owner: guest
+  owner: user:guest
diff --git a/plugins/scaffolder-backend/sample-templates/pull-request/template/catalog-info.yaml b/plugins/scaffolder-backend/sample-templates/pull-request/template/catalog-info.yaml
index dd1e0ebd09..04f055bd46 100644
--- a/plugins/scaffolder-backend/sample-templates/pull-request/template/catalog-info.yaml
+++ b/plugins/scaffolder-backend/sample-templates/pull-request/template/catalog-info.yaml
@@ -5,4 +5,4 @@ metadata:
 spec:
   type: website
   lifecycle: experimental
-  owner: guest
+  owner: user:guest