diff --git a/resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/submit/submitsteps/hadoopsteps/HadoopKerberosKeytabResolverStep.scala b/resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/submit/submitsteps/hadoopsteps/HadoopKerberosKeytabResolverStep.scala
index 635de4a859969..cb573ed68f766 100644
--- a/resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/submit/submitsteps/hadoopsteps/HadoopKerberosKeytabResolverStep.scala
+++ b/resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/submit/submitsteps/hadoopsteps/HadoopKerberosKeytabResolverStep.scala
@@ -100,6 +100,7 @@ private[spark] class HadoopKerberosKeytabResolverStep(
       val initialTokenDataKeyName = s"$KERBEROS_SECRET_LABEL_PREFIX-$currentTime-$renewalInterval"
       val uniqueSecretName =
         s"$kubernetesResourceNamePrefix-$KERBEROS_DELEGEGATION_TOKEN_SECRET_NAME.$currentTime"
+        .toLowerCase
       val secretDT =
         new SecretBuilder()
           .withNewMetadata()