diff --git a/api/v1/weightsandbiases_conversion_mapping.go b/api/v1/weightsandbiases_conversion_mapping.go
index d1c94b76..53e1595b 100644
--- a/api/v1/weightsandbiases_conversion_mapping.go
+++ b/api/v1/weightsandbiases_conversion_mapping.go
@@ -114,6 +114,9 @@ func applyGlobalMappings(globalMap map[string]interface{}, dst *appsv2.WeightsAn
 	if err := mapCustomCACerts(globalMap, dst); err != nil {
 		return err
 	}
+	if err := mapImageRegistry(globalMap, dst); err != nil {
+		return err
+	}
 	if err := mapOIDC(globalMap, dst); err != nil {
 		return err
 	}
@@ -133,6 +136,28 @@ func applyGlobalMappings(globalMap map[string]interface{}, dst *appsv2.WeightsAn
 	return nil
 }
 
+func mapImageRegistry(globalMap map[string]interface{}, dst *appsv2.WeightsAndBiases) error {
+	registry, _, err := unstructured.NestedString(globalMap, "imageRegistry")
+	if err != nil {
+		return fmt.Errorf("spec.values.global.imageRegistry: %w", err)
+	}
+	if registry != "" {
+		dst.Spec.Global.ImageRegistry = registry
+	}
+
+	prefix, _, err := unstructured.NestedString(globalMap, "repositoryPrefix")
+	if err != nil {
+		return fmt.Errorf("spec.values.global.repositoryPrefix: %w", err)
+	}
+	if prefix != "" && registry == "" {
+		logger.Info("spec.values.global.repositoryPrefix has no v2 equivalent and is not converted; "+
+			"set spec.global.imageRegistry explicitly if images must resolve against a mirror",
+			"repositoryPrefix", prefix)
+	}
+
+	return nil
+}
+
 func mapCustomCACerts(globalMap map[string]interface{}, dst *appsv2.WeightsAndBiases) error {
 	if certs, found, err := unstructured.NestedStringSlice(globalMap, "customCACerts"); err != nil {
 		return fmt.Errorf("spec.values.global.customCACerts: %w", err)
diff --git a/api/v1/weightsandbiases_conversion_test.go b/api/v1/weightsandbiases_conversion_test.go
index 014b614c..b96929b0 100644
--- a/api/v1/weightsandbiases_conversion_test.go
+++ b/api/v1/weightsandbiases_conversion_test.go
@@ -159,6 +159,82 @@ func TestConvertTo_CustomCACerts(t *testing.T) {
 	require.Equal(t, "corp-ca-certs", dst.Spec.Global.CACertsConfigMap)
 }
 
+func TestConvertTo_ImageRegistry(t *testing.T) {
+	dst := &appsv2.WeightsAndBiases{}
+	src := newV1(map[string]interface{}{
+		"global": map[string]interface{}{
+			"imageRegistry": "registry.internal.example.com/wandb-mirror",
+		},
+	})
+	require.NoError(t, src.ConvertTo(dst))
+
+	require.Equal(t, "registry.internal.example.com/wandb-mirror", dst.Spec.Global.ImageRegistry)
+}
+
+func TestConvertTo_ImageRegistryAbsent(t *testing.T) {
+	dst := &appsv2.WeightsAndBiases{}
+	src := newV1(map[string]interface{}{
+		"global": map[string]interface{}{"host": "http://wandb.example.com"},
+	})
+	require.NoError(t, src.ConvertTo(dst))
+
+	require.Empty(t, dst.Spec.Global.ImageRegistry)
+}
+
+// TestConvertTo_ImageRegistryEmptyStringNotCopied: an empty v1 value must not
+// overwrite a registry the CR already carries across a v2 → v1 → v2 bounce.
+func TestConvertTo_ImageRegistryEmptyStringNotCopied(t *testing.T) {
+	dst := &appsv2.WeightsAndBiases{}
+	dst.Spec.Global.ImageRegistry = "already-set.example.com"
+	src := newV1(map[string]interface{}{
+		"global": map[string]interface{}{"imageRegistry": ""},
+	})
+	require.NoError(t, src.ConvertTo(dst))
+
+	require.Equal(t, "already-set.example.com", dst.Spec.Global.ImageRegistry)
+}
+
+// TestConvertTo_ImageRegistryWithRepositoryPrefix: v1 commonly sets both; only
+// imageRegistry has a v2 home, and it must win.
+func TestConvertTo_ImageRegistryWithRepositoryPrefix(t *testing.T) {
+	dst := &appsv2.WeightsAndBiases{}
+	src := newV1(map[string]interface{}{
+		"global": map[string]interface{}{
+			"imageRegistry":    "us-docker.pkg.dev/wandb-production/public",
+			"repositoryPrefix": "us-docker.pkg.dev/wandb-production/public",
+		},
+	})
+	require.NoError(t, src.ConvertTo(dst))
+
+	require.Equal(t, "us-docker.pkg.dev/wandb-production/public", dst.Spec.Global.ImageRegistry)
+}
+
+// TestConvertTo_RepositoryPrefixOnlyIsNotConverted: repositoryPrefix has no v2
+// equivalent, so it is logged and dropped rather than guessed at.
+func TestConvertTo_RepositoryPrefixOnlyIsNotConverted(t *testing.T) {
+	dst := &appsv2.WeightsAndBiases{}
+	src := newV1(map[string]interface{}{
+		"global": map[string]interface{}{
+			"repositoryPrefix": "us-docker.pkg.dev/wandb-production/public",
+		},
+	})
+	require.NoError(t, src.ConvertTo(dst))
+
+	require.Empty(t, dst.Spec.Global.ImageRegistry)
+}
+
+func TestConvertTo_ImageRegistryNonStringFails(t *testing.T) {
+	dst := &appsv2.WeightsAndBiases{}
+	src := newV1(map[string]interface{}{
+		"global": map[string]interface{}{
+			"imageRegistry": map[string]interface{}{"unexpected": "shape"},
+		},
+	})
+	err := src.ConvertTo(dst)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "spec.values.global.imageRegistry")
+}
+
 func TestConvertTo_VersionFromAppImageTag(t *testing.T) {
 	dst := &appsv2.WeightsAndBiases{}
 	src := newV1(map[string]interface{}{