diff --git a/helm/templates/deployment-cache-server.yaml b/helm/templates/deployment-cache-server.yaml
index cac0f49fb..6ed2ecf27 100644
--- a/helm/templates/deployment-cache-server.yaml
+++ b/helm/templates/deployment-cache-server.yaml
@@ -16,6 +16,9 @@ spec:
       labels:
       {{- include "chart.cacheserverLabels" . | nindent 8 }}
     spec:
+      {{- if .Values.cacheserverSpec.priorityClassName}}
+      priorityClassName: {{ .Values.cacheserverSpec.priorityClassName | quote }}
+      {{- end }}
       {{- if .Values.cacheserverSpec.nodeSelectorTerms}}
       affinity:
         nodeAffinity:
diff --git a/helm/templates/deployment-router.yaml b/helm/templates/deployment-router.yaml
index 64711b37e..4e27e5c0c 100644
--- a/helm/templates/deployment-router.yaml
+++ b/helm/templates/deployment-router.yaml
@@ -18,6 +18,9 @@ spec:
       {{- include "chart.routerLabels" . | nindent 8 }}
     spec:
       serviceAccountName: {{ .Release.Name }}-router-service-account
+      {{- if .Values.routerSpec.priorityClassName }}
+      priorityClassName: {{ .Values.routerSpec.priorityClassName | quote }}
+      {{- end }}
       {{- if .Values.routerSpec.nodeSelectorTerms }}
       affinity:
         nodeAffinity:
diff --git a/helm/templates/deployment-vllm-multi.yaml b/helm/templates/deployment-vllm-multi.yaml
index 1a1119ed3..ccbfa943b 100644
--- a/helm/templates/deployment-vllm-multi.yaml
+++ b/helm/templates/deployment-vllm-multi.yaml
@@ -43,6 +43,9 @@ spec:
         helm-release-name: {{ .Release.Name }}
       {{- include "chart.engineLabels" . | nindent 8 }}
     spec:
+      {{- if $modelSpec.priorityClassName }}
+      priorityClassName: {{ $modelSpec.priorityClassName | quote }}
+      {{- end }}
       {{- if hasKey $modelSpec "initContainer" }}
       {{- $container := $modelSpec.initContainer }}
       initContainers:
diff --git a/helm/values.schema.json b/helm/values.schema.json
index 14393dd77..a8ff97454 100644
--- a/helm/values.schema.json
+++ b/helm/values.schema.json
@@ -88,6 +88,9 @@
               "requestGPUType": {
                 "type": "string"
               },
+              "priorityClassName": {
+                "type": "string"
+              },
               "pvcStorage": {
                 "type": "string"
               },
diff --git a/helm/values.yaml b/helm/values.yaml
index b4862742b..4578a8093 100644
--- a/helm/values.yaml
+++ b/helm/values.yaml
@@ -18,6 +18,7 @@ servingEngineSpec:
   # Each entry in the modelSpec array should contain the following fields:
   # - annotations: (Optional, map) The annotations to add to the deployment, e.g., {model: "opt125m"}
   # - serviceAccountName: (Optional, string) The name of the service account to use for the deployment, e.g., "vllm-service-account"
+  # - priorityClassName: (Optional, string) The name of the priority class name for the deployment, e.g., "high-priority"
   # - podAnnotations: (Optional, map) The annotations to add to the pod, e.g., {model: "opt125m"}
   # - name: (string) The name of the model, e.g., "example-model"
   # - repository: (string) The repository of the model, e.g., "vllm/vllm-openai"
@@ -267,6 +268,9 @@ routerSpec:
   # -- Number of replicas
   replicaCount: 1
 
+  # -- Priority Class
+  priorityClassName: ""
+
   # -- Container port
   containerPort: 8000