Keanu Reeves is rumored to be dating actress Parker Posey.

The actor and 'You've Got Mail' star were reportedly "sitting very close" at Los Angeles' Chateau Marmont hotel last week.

An onlooker said: "They were sharing a seat and sitting very, very close. They were laughing and joking, and looked as though they were having a really good time. But it was probably the oddest couple I've ever seen!"

This isn''t the first time the pair have met.

In 2004, Parker -- who is known for her roles in small, independent films -- approached Keanu about a movie.

She said at the time: "I pitched Keanu Reeves on an idea - that he and I should play the 70s-era mime super-couple Shields and Yarnell in a silent action-adventure movie. We'd solve mysteries, and there'd be invisible objects for us to battle." The film was never made."

Keanu hasn''t been in a serious relationship since his long-term girlfriend Jennifer Syme was killed in a car accident in April 2001. Her death came after she gave birth to the couple's stillborn daughter Ava Archer Reeves in December 1999.

Parker has been romantically linked to 'New York' rocker Ryan Adams and writer Thomas Beller.