"Guy talked about that all the time and said, 'What if the fountain of youth was inside you? What if it's just a metaphor for the light inside you that you can either make brighter or dimmer? And what if you worked really hard to pull out all the things that made you joyful,

Mileage will also vary for the bickering chemistry between stars John Krasinski and Natalie Portman, though deft supporting turns inject welcome flashes of unpredictability into this mostly paint-by-numbers affair.