"How Do You Know" premiere in LA (8 images)

Actress Reese Witherspoon, a cast member in the motion picture romantic comedy "How Do You Know", attends the premiere of the film at the Mann Village Theatre in the Westwood section of Los Angeles on December 13, 2010. UPI/Jim Ruymen

Actors Paul Rudd (L) and Owen Wilson, cast members in the motion picture romantic comedy "How Do You Know", attend the premiere of the film at the Mann Village Theatre in the Westwood section of Los Angeles on December 13, 2010. UPI/Jim Ruymen

Actor Jack Nicholson (R), a cast member in the motion picture romantic comedy "How Do You Know", is greeted by his daughter Jennifer Nicholson and her sons Duke (L) and Sean (3rd-L) as he arrive for the premiere of the film at the Mann Village Theatre in the Westwood section of Los Angeles on December 13, 2010. UPI/Jim Ruymen

Actor Owen Wilson, a cast member in the motion picture romantic comedy "How Do You Know", attends the premiere of the film at the Mann Village Theatre in the Westwood section of Los Angeles on December 13, 2010. UPI/Jim Ruymen