diff --git a/pyiceberg/catalog/rest/__init__.py b/pyiceberg/catalog/rest/__init__.py
index 785940ea54..bcf883c4ad 100644
--- a/pyiceberg/catalog/rest/__init__.py
+++ b/pyiceberg/catalog/rest/__init__.py
@@ -18,6 +18,7 @@
 
 import logging
 import os
+import platform
 import sys
 import time
 import uuid
@@ -1231,7 +1232,9 @@ def _config_headers(self, session: Session) -> None:
         header_properties = get_header_properties(self.properties)
         session.headers.update(header_properties)
         session.headers["Content-type"] = "application/json"
-        session.headers["User-Agent"] = f"PyIceberg/{__version__}"
+        session.headers["User-Agent"] = (
+            f"pyiceberg/{__version__} ({platform.python_implementation().lower()} {platform.python_version()})"
+        )
         session.headers["X-Client-Version"] = f"PyIceberg {__version__}"
         session.headers.setdefault("X-Iceberg-Access-Delegation", ACCESS_DELEGATION_DEFAULT)
 
diff --git a/tests/catalog/test_rest.py b/tests/catalog/test_rest.py
index a11adc55ee..01f2ae8c05 100644
--- a/tests/catalog/test_rest.py
+++ b/tests/catalog/test_rest.py
@@ -19,6 +19,7 @@
 
 import base64
 import os
+import platform
 import uuid
 from collections.abc import Callable, Iterator
 from contextlib import contextmanager
@@ -95,7 +96,7 @@
 
 TEST_HEADERS = {
     "Content-type": "application/json",
-    "User-Agent": f"PyIceberg/{pyiceberg.__version__}",
+    "User-Agent": f"pyiceberg/{pyiceberg.__version__} ({platform.python_implementation().lower()} {platform.python_version()})",
     "Authorization": f"Bearer {TEST_TOKEN}",
     "X-Iceberg-Access-Delegation": "vended-credentials",
 }
@@ -3217,6 +3218,20 @@ def test_auth_header(rest_mock: Mocker) -> None:
     )
 
 
+@pytest.mark.parametrize(
+    ("implementation", "python_version", "expected"),
+    [("CPython", "3.11.4", "pyiceberg/0.11.0 (cpython 3.11.4)"), ("PyPy", "3.10.16", "pyiceberg/0.11.0 (pypy 3.10.16)")],
+)
+def test_user_agent_header(
+    rest_mock: Mocker, monkeypatch: pytest.MonkeyPatch, implementation: str, python_version: str, expected: str
+) -> None:
+    monkeypatch.setattr("pyiceberg.catalog.rest.__version__", "0.11.0")
+    monkeypatch.setattr(platform, "python_implementation", lambda: implementation)
+    monkeypatch.setattr(platform, "python_version", lambda: python_version)
+    catalog = RestCatalog("rest", uri=TEST_URI, warehouse="s3://some-bucket")
+    assert catalog._session.headers["User-Agent"] == expected
+
+
 def test_client_version_header(rest_mock: Mocker) -> None:
     catalog = RestCatalog("rest", uri=TEST_URI, warehouse="s3://some-bucket")
     assert catalog._session.headers.get("X-Client-Version") == f"PyIceberg {pyiceberg.__version__}"