diff --git a/config/crd/multicluster.x-k8s.io_serviceimports.yaml b/config/crd/multicluster.x-k8s.io_serviceimports.yaml
index c3a1220..b405a72 100644
--- a/config/crd/multicluster.x-k8s.io_serviceimports.yaml
+++ b/config/crd/multicluster.x-k8s.io_serviceimports.yaml
@@ -72,6 +72,15 @@ spec:
                 - ports
                 - type
               properties:
+                ipFamilies:
+                  description: IPFamilies identifies all the IPFamilies assigned for this ServiceImport.
+                  type: array
+                  maxItems: 2
+                  items:
+                    description: |-
+                      IPFamily represents the IP Family (IPv4 or IPv6). This type is used
+                      to express the family of an IP expressed by a type (e.g. service.spec.ipFamilies).
+                    type: string
                 ips:
                   description: ip will be used as the VIP for this service when type is ClusterSetIP.
                   type: array
diff --git a/pkg/apis/v1alpha1/serviceimport.go b/pkg/apis/v1alpha1/serviceimport.go
index 8810a63..4429664 100644
--- a/pkg/apis/v1alpha1/serviceimport.go
+++ b/pkg/apis/v1alpha1/serviceimport.go
@@ -84,6 +84,10 @@ type ServiceImportSpec struct {
 	// sessionAffinityConfig contains session affinity configuration.
 	// +optional
 	SessionAffinityConfig *v1.SessionAffinityConfig `json:"sessionAffinityConfig,omitempty"`
+	// IPFamilies identifies all the IPFamilies assigned for this ServiceImport.
+	// +kubebuilder:validation:MaxItems:=2
+	// +optional
+	IPFamilies []v1.IPFamily `json:"ipFamilies,omitempty"`
 }
 
 // ServicePort represents the port on which the service is exposed
diff --git a/pkg/apis/v1alpha1/zz_generated.deepcopy.go b/pkg/apis/v1alpha1/zz_generated.deepcopy.go
index 7218123..1922458 100644
--- a/pkg/apis/v1alpha1/zz_generated.deepcopy.go
+++ b/pkg/apis/v1alpha1/zz_generated.deepcopy.go
@@ -230,6 +230,11 @@ func (in *ServiceImportSpec) DeepCopyInto(out *ServiceImportSpec) {
 		*out = new(corev1.SessionAffinityConfig)
 		(*in).DeepCopyInto(*out)
 	}
+	if in.IPFamilies != nil {
+		in, out := &in.IPFamilies, &out.IPFamilies
+		*out = make([]corev1.IPFamily, len(*in))
+		copy(*out, *in)
+	}
 }
 
 // DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new ServiceImportSpec.