If you're one of those people who, regardless of your age or stage of life, still feel like you're not quite one of the grown ups, that you're a youngster pretending to do and be what folks your age should be doing, then WHILE WE'RE YOUNG will resonate. I assure you I am one of those people, and I assure you the recent dramedy from writer/director Noah Baumbach hit home—and the heart—on multiple levels.

Ben Stiller and Naomi Watts, both teetering on joining the 50+ club in real life play 40-something Josh and Cornelia, a...