diff --git a/apis/v1alpha3/tlsroute_types.go b/apis/v1alpha3/tlsroute_types.go
index 7bcb48e74b..60e2dc7b99 100644
--- a/apis/v1alpha3/tlsroute_types.go
+++ b/apis/v1alpha3/tlsroute_types.go
@@ -86,6 +86,7 @@ type TLSRouteSpec struct {
 	//
 	// +kubebuilder:validation:MinItems=1
 	// +kubebuilder:validation:MaxItems=16
+	// +required
 	Hostnames []Hostname `json:"hostnames,omitempty"`
 
 	// Rules are a list of TLS matchers and actions.
diff --git a/config/crd/experimental/gateway.networking.k8s.io_tlsroutes.yaml b/config/crd/experimental/gateway.networking.k8s.io_tlsroutes.yaml
index 4392eff57f..923fa49ba5 100644
--- a/config/crd/experimental/gateway.networking.k8s.io_tlsroutes.yaml
+++ b/config/crd/experimental/gateway.networking.k8s.io_tlsroutes.yaml
@@ -1277,6 +1277,7 @@ spec:
                   rule: self.all(l1, !has(l1.name) || self.exists_one(l2, has(l2.name)
                     && l1.name == l2.name))
             required:
+            - hostnames
             - rules
             type: object
           status:
diff --git a/pkg/generated/openapi/zz_generated.openapi.go b/pkg/generated/openapi/zz_generated.openapi.go
index b26723bcec..7dcbaa33b6 100644
--- a/pkg/generated/openapi/zz_generated.openapi.go
+++ b/pkg/generated/openapi/zz_generated.openapi.go
@@ -7321,7 +7321,7 @@ func schema_sigsk8sio_gateway_api_apis_v1alpha3_TLSRouteSpec(ref common.Referenc
 						},
 					},
 				},
-				Required: []string{"rules"},
+				Required: []string{"hostnames", "rules"},
 			},
 		},
 		Dependencies: []string{