The prospect of getting older doesn't bother the Butter beauty. "I like being 40," she recently told David Letterman. Her husband Ben Affleck, however, is another story. "I don't know that he's as thrilled with the idea of 40 as I am," the mom to Violet, 6, Seraphina, 3, and Samuel, 8 months, revealed. "I really like it. I had no problem with it. I feel like, what more could I want? [It] doesn't look he's as happy as I am about turning 40."