Sean Penn, 48, has filed for separation from his wife Robin Wright Penn, 43, whom he has been married to for 13 years. He is asking that the court not award any support to her and is seeking joint custody of their kids Dylan, 18 and Hopper, 15. Penn starting dating Robin after he broke up with Madonna, and they went on to appear in Hurlyburly and She's So Lovely together. Wags took note when Penn failed to thank Robin in his Best Actor Oscar acceptance speech in March. (Photo: WENN)