This weekend, a middle-aged couple (Ben Stiller, Naomi Watts) has their lives overturned when they meet a disarming young couple (Adam Driver, Amanda Seyfried) in "While We're Young," directed by Noah Baumbach ("The Squid and the Whale," "Margot at the Wedding"). We got a chance to sit down with star Watts to chat about the movie, aging, and what keeps her young at heart.This weekend, a middle-aged couple (Ben Stiller, Naomi Watts) has their lives overturned when they meet a disarming young couple (Adam Driver, Amanda Seyfried) in "While We're Young," directed by Noah Baumbach ("The Squid and the Whale," "Margot at the Wedding"). We got a chance to sit down with star Watts to chat about the movie, aging, and what keeps her young at heart.