diff --git a/third_party/2and3/first.pyi b/third_party/2and3/first.pyi
new file mode 100644
index 000000000..f03f3a35b
--- /dev/null
+++ b/third_party/2and3/first.pyi
@@ -0,0 +1,13 @@
+from typing import Any, Callable, Iterable, Optional, overload, TypeVar, Union
+
+_T = TypeVar('_T')
+_S = TypeVar('_S')
+
+@overload
+def first(iterable: Iterable[_T]) -> Optional[_T]: ...
+@overload
+def first(iterable: Iterable[_T], default: _S) -> Union[_T, _S]: ...
+@overload
+def first(iterable: Iterable[_T], default: _S, key: Optional[Callable[[_T], Any]]) -> Union[_T, _S]: ...
+@overload
+def first(iterable: Iterable[_T], *, key: Optional[Callable[[_T], Any]]) -> Optional[_T]: ...