diff --git a/pkg/framework/plugins/removeduplicates/defaults.go b/pkg/framework/plugins/removeduplicates/defaults.go
new file mode 100644
index 000000000..7da4f6898
--- /dev/null
+++ b/pkg/framework/plugins/removeduplicates/defaults.go
@@ -0,0 +1,33 @@
+/*
+Copyright 2022 The Kubernetes Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package removeduplicates
+
+import (
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+func addDefaultingFuncs(scheme *runtime.Scheme) error {
+	return RegisterDefaults(scheme)
+}
+
+// SetDefaults_RemoveDuplicatesArgs
+// TODO: the final default values would be discussed in community
+func SetDefaults_RemoveDuplicatesArgs(obj *RemoveDuplicatesArgs) {
+	if obj.Namespaces == nil {
+		obj.Namespaces = nil
+	}
+	if obj.ExcludeOwnerKinds == nil {
+		obj.ExcludeOwnerKinds = nil
+	}
+}
diff --git a/pkg/framework/plugins/removeduplicates/defaults_test.go b/pkg/framework/plugins/removeduplicates/defaults_test.go
new file mode 100644
index 000000000..b594b4318
--- /dev/null
+++ b/pkg/framework/plugins/removeduplicates/defaults_test.go
@@ -0,0 +1,60 @@
+/*
+Copyright 2022 The Kubernetes Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package removeduplicates
+
+import (
+	"github.com/google/go-cmp/cmp"
+	"k8s.io/apimachinery/pkg/runtime"
+	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
+	"sigs.k8s.io/descheduler/pkg/api"
+	"testing"
+)
+
+func TestSetDefaults_RemoveDuplicatesArgs(t *testing.T) {
+	tests := []struct {
+		name string
+		in   runtime.Object
+		want runtime.Object
+	}{
+		{
+			name: "RemoveDuplicatesArgs empty",
+			in:   &RemoveDuplicatesArgs{},
+			want: &RemoveDuplicatesArgs{
+				Namespaces:        nil,
+				ExcludeOwnerKinds: nil,
+			},
+		},
+		{
+			name: "RemoveDuplicatesArgs with value",
+			in: &RemoveDuplicatesArgs{
+				Namespaces:        &api.Namespaces{},
+				ExcludeOwnerKinds: []string{"ReplicaSet"},
+			},
+			want: &RemoveDuplicatesArgs{
+				Namespaces:        &api.Namespaces{},
+				ExcludeOwnerKinds: []string{"ReplicaSet"},
+			},
+		},
+	}
+	for _, tc := range tests {
+		scheme := runtime.NewScheme()
+		utilruntime.Must(AddToScheme(scheme))
+		t.Run(tc.name, func(t *testing.T) {
+			scheme.Default(tc.in)
+			if diff := cmp.Diff(tc.in, tc.want); diff != "" {
+				t.Errorf("Got unexpected defaults (-want, +got):\n%s", diff)
+			}
+		})
+	}
+}
diff --git a/pkg/framework/plugins/removeduplicates/doc.go b/pkg/framework/plugins/removeduplicates/doc.go
new file mode 100644
index 000000000..b54e0840b
--- /dev/null
+++ b/pkg/framework/plugins/removeduplicates/doc.go
@@ -0,0 +1,16 @@
+/*
+Copyright 2022 The Kubernetes Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// +k8s:defaulter-gen=TypeMeta
+
+package removeduplicates
diff --git a/pkg/framework/plugins/removeduplicates/register.go b/pkg/framework/plugins/removeduplicates/register.go
new file mode 100644
index 000000000..02dd932b6
--- /dev/null
+++ b/pkg/framework/plugins/removeduplicates/register.go
@@ -0,0 +1,31 @@
+/*
+Copyright 2022 The Kubernetes Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package removeduplicates
+
+import (
+	"k8s.io/apimachinery/pkg/runtime"
+)
+
+var (
+	SchemeBuilder      = runtime.NewSchemeBuilder()
+	localSchemeBuilder = &SchemeBuilder
+	AddToScheme        = localSchemeBuilder.AddToScheme
+)
+
+func init() {
+	// We only register manually written functions here. The registration of the
+	// generated functions takes place in the generated files. The separation
+	// makes the code compile even when the generated files are missing.
+	localSchemeBuilder.Register(addDefaultingFuncs)
+}
diff --git a/pkg/framework/plugins/removeduplicates/zz_generated.defaults.go b/pkg/framework/plugins/removeduplicates/zz_generated.defaults.go
new file mode 100644
index 000000000..2ee3e64b7
--- /dev/null
+++ b/pkg/framework/plugins/removeduplicates/zz_generated.defaults.go
@@ -0,0 +1,38 @@
+//go:build !ignore_autogenerated
+// +build !ignore_autogenerated
+
+/*
+Copyright 2022 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Code generated by defaulter-gen. DO NOT EDIT.
+
+package removeduplicates
+
+import (
+	runtime "k8s.io/apimachinery/pkg/runtime"
+)
+
+// RegisterDefaults adds defaulters functions to the given scheme.
+// Public to allow building arbitrary schemes.
+// All generated defaulters are covering - they call all nested defaulters.
+func RegisterDefaults(scheme *runtime.Scheme) error {
+	scheme.AddTypeDefaultingFunc(&RemoveDuplicatesArgs{}, func(obj interface{}) { SetObjectDefaults_RemoveDuplicatesArgs(obj.(*RemoveDuplicatesArgs)) })
+	return nil
+}
+
+func SetObjectDefaults_RemoveDuplicatesArgs(in *RemoveDuplicatesArgs) {
+	SetDefaults_RemoveDuplicatesArgs(in)
+}