Brad Pitt Brad Pitt

Brad Pitt turned 45 on Thursday, and his new movie, in which the actor ages backwards, The Curious Case of Benjamin Button, has really made an impact on his outlook on life.

"It just made me think about the ticking clock. Am I in mid-life? Am I halfway there? Do I have 10 years, five years?" he told The Los Angeles Times. "And so what are those moments going to be that I do know I have, which is now?"

The father of six, who earned a Screen Actors Guild nod for this role, also told Rolling Stone he has been thinking about what's to come and the changes he has made in his life after making this movie.  

"Angie [Jolie] and I do not fight anymore," he said. "What occurred to me on this film, and also with the passing of her mother [actress Marcheline Bertrand in 2007], is that there's going to come a time when I'm not going to get to be with this person anymore. I'm not going to get to be with my children anymore. Or friends, people I love and respect. And so, if we have a flare-up, it evaporates now."