diff --git a/cmd/flagger/main.go b/cmd/flagger/main.go
index 8efb4cf8..62f442f7 100644
--- a/cmd/flagger/main.go
+++ b/cmd/flagger/main.go
@@ -83,6 +83,7 @@ var (
 	enableConfigTracking     bool
 	ver                      bool
 	kubeconfigServiceMesh    string
+	clusterName              string
 )
 
 func init() {
@@ -115,6 +116,7 @@ func init() {
 	flag.BoolVar(&enableConfigTracking, "enable-config-tracking", true, "Enable secrets and configmaps tracking.")
 	flag.BoolVar(&ver, "version", false, "Print version")
 	flag.StringVar(&kubeconfigServiceMesh, "kubeconfig-service-mesh", "", "Path to a kubeconfig for the service mesh control plane cluster.")
+	flag.StringVar(&clusterName, "cluster-name", "", "Cluster name to be included in alert msgs.")
 }
 
 func main() {
@@ -238,6 +240,7 @@ func main() {
 		meshProvider,
 		version.VERSION,
 		fromEnv("EVENT_WEBHOOK_URL", eventWebhook),
+		clusterName,
 	)
 
 	// leader election context
diff --git a/pkg/controller/controller.go b/pkg/controller/controller.go
index aad82e4c..87390ec5 100644
--- a/pkg/controller/controller.go
+++ b/pkg/controller/controller.go
@@ -66,6 +66,7 @@ type Controller struct {
 	observerFactory  *observers.Factory
 	meshProvider     string
 	eventWebhook     string
+	clusterName      string
 }
 
 type Informers struct {
@@ -87,6 +88,7 @@ func NewController(
 	meshProvider string,
 	version string,
 	eventWebhook string,
+	clusterName string,
 ) *Controller {
 	logger.Debug("Creating event broadcaster")
 	flaggerscheme.AddToScheme(scheme.Scheme)
@@ -118,6 +120,7 @@ func NewController(
 		routerFactory:    routerFactory,
 		meshProvider:     meshProvider,
 		eventWebhook:     eventWebhook,
+		clusterName:      clusterName,
 	}
 
 	flaggerInformers.CanaryInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
diff --git a/pkg/controller/events.go b/pkg/controller/events.go
index c70123e6..283aa279 100644
--- a/pkg/controller/events.go
+++ b/pkg/controller/events.go
@@ -74,7 +74,7 @@ func (c *Controller) sendEventToWebhook(r *flaggerv1.Canary, eventType, template
 func (c *Controller) alert(canary *flaggerv1.Canary, message string, metadata bool, severity flaggerv1.AlertSeverity) {
 	var fields []notifier.Field
 	if metadata {
-		fields = alertMetadata(canary)
+		fields = alertMetadata(canary, c.clusterName)
 	}
 
 	// send alert with the global notifier
@@ -173,8 +173,18 @@ func (c *Controller) alert(canary *flaggerv1.Canary, message string, metadata bo
 	}
 }
 
-func alertMetadata(canary *flaggerv1.Canary) []notifier.Field {
+func alertMetadata(canary *flaggerv1.Canary, cluster string) []notifier.Field {
 	var fields []notifier.Field
+
+	if cluster != "" {
+		fields = append(fields,
+			notifier.Field{
+				Name:  "Cluster",
+				Value: cluster,
+			},
+		)
+	}
+
 	fields = append(fields,
 		notifier.Field{
 			Name:  "Target",