updated 09/16/2009 AT 1:00 PM ET
•originally published 09/16/2009 AT 2:00 PM ET
Expecting diva-like antics from Jennifer Aniston? No way, says her costar in the upcoming Love Happens.
“She was very easygoing, very effortless,” Aaron Eckhart, 41, told PEOPLE at the movie’s premiere in Westwood, Calif., Tuesday. “I think that’s the word I want to use: effortless.”