'What If': Daniel Radcliffe, Zoe Kazan, romantic possibilities

What If is a romantic comedy about platonic best friends who find themselves wondering - increasingly, but hardly ever at the same time - whether the platonic part is a good idea. Deftly walking a tricky line between the predictable and the toxically cute, the film, set in a photogenic Toronto a-crawl with millennials, stars Daniel Radcliffe and Zoe Kazan, and this pairing alone is enough to recommend it.