Liv Rundgren Tyler (born Liv Rundgren; July 1, 1977) is an American actress and former child model who played Betty Ross in The Incredible Hulk and will reprise her role in Avengers: Infinity War. She is well known for playing Arwen the she-elf in The Lord of the Rings film trilogy.

For Disney, she played Grace Stamper in the 1998 Touchstone Pictures film Armageddon. She also played Maya Harding in the Miramax Films film Jersey Girl.