diff --git a/packages/react-native/ReactCommon/jsi/jsi/jsi.cpp b/packages/react-native/ReactCommon/jsi/jsi/jsi.cpp
index 79eb311dc3c501..4b5a8e6e7366b2 100644
--- a/packages/react-native/ReactCommon/jsi/jsi/jsi.cpp
+++ b/packages/react-native/ReactCommon/jsi/jsi/jsi.cpp
@@ -284,6 +284,8 @@ HostObject::~HostObject() {}
 
 NativeState::~NativeState() {}
 
+Serialized::~Serialized() {}
+
 Runtime::~Runtime() {}
 
 ICast* Runtime::castInterface(const UUID& /*interfaceUUID*/) {
diff --git a/packages/react-native/ReactCommon/jsi/jsi/jsi.h b/packages/react-native/ReactCommon/jsi/jsi/jsi.h
index 08edcd2a0323a0..069987ff3a70a9 100644
--- a/packages/react-native/ReactCommon/jsi/jsi/jsi.h
+++ b/packages/react-native/ReactCommon/jsi/jsi/jsi.h
@@ -252,6 +252,65 @@ class JSI_EXPORT NativeState {
   virtual ~NativeState();
 };
 
+/// Opaque class that is used to store serialized object from a runtime. The
+/// lifetime of this object is orthogonal to the original runtime object, and
+/// may outlive the original object.
+class JSI_EXPORT Serialized {
+ public:
+  /// Uses \p secretAddr to validate if the Serialized data is supported. If so,
+  /// return the pointer to the underlying serialized data. Otherwise, return a
+  /// nullptr. This should be used by the runtime to deserialize the data.
+  virtual void* getPrivate(const void* secretAddr) = 0;
+  virtual ~Serialized();
+};
+
+/// Provides a set of APIs that allows copying objects between different
+/// runtime instances. The runtimes instances must be of the same type. As an
+/// example, a serialized object from Hermes runtime may only be deserialized by
+/// another Hermes runtime.
+class JSI_EXPORT ISerialization : public ICast {
+ public:
+  static constexpr jsi::UUID uuid{
+      0xd40fe0ec,
+      0xa47c,
+      0x42c9,
+      0x8c09,
+      0x661aeab832d8};
+
+  /// Serializes the given Value \p value using the structured clone algorithm.
+  /// It returns a shared pointer of an opaque Serialized object that can be
+  /// deserialized multiple times. The lifetime of the Serialized object is not
+  /// tied to the lifetime of the original object.
+  virtual std::shared_ptr<Serialized> serialize(Value& value) = 0;
+
+  /// Given a Serialized object provided by \p serialized, deserialize it using
+  /// the structured clone algorithm into a JS value in the current runtime.
+  /// Returns the deserialized JS value.
+  virtual Value deserialize(const std::shared_ptr<Serialized>& serialized) = 0;
+
+  /// Serializes the given jsi::Value \p value using the structured clone
+  /// algorithm. \p transferList must be a JS Array. Given the length property
+  /// of \p transferList, it will transfer everything at index [0, length - 1].
+  /// It returns a unique pointer of an opaque Serialized object that can be
+  /// deserialized once only by deserializeWithTransfer. The lifetime of the
+  /// Serialized object is not tied to the lifetime of the original object.
+  virtual std::unique_ptr<Serialized> serializeWithTransfer(
+      Value& value,
+      const Array& transferList) = 0;
+
+  /// Using the structure clone algorithm, deserialize the object provided by \p
+  /// serialized into a JS value in the current runtime. \p serialized must be
+  /// created by serializeWithTransfer. This will consume the serialized data
+  /// entirely to transfer the object to the current runtime. Returns an Array
+  /// containing the deserialized values, where the first element is the value
+  /// passed into serializeWithTransfer, followed by all transferred values.
+  virtual Array deserializeWithTransfer(
+      std::unique_ptr<Serialized>& serialized) = 0;
+
+ protected:
+  ~ISerialization() = default;
+};
+
 /// Represents a JS runtime.  Movable, but not copyable.  Note that
 /// this object may not be thread-aware, but cannot be used safely from
 /// multiple threads at once.  The application is responsible for