How Greta Gerwig Keeps Her Boyfriend Noah Baumbach Young

Writer/director Noah Baumbach's latest movie, While We're Young, is about a husband and wife in their 40s (played by Ben Stiller and Naomi Watts) who befriend a twentysomething couple and awkwardly try to recapture their youth. It's a classic tale, and one that maybe, possibly draws at times from …