The chemistry between them shines bright from the minute they set eyes upon one another. Kazan, in particular, who came to audiences attention in Kelly Reichardt western Meek's Cutoff (2010) and the inventive Ruby Sparks (2012), is spectacular here, admirably turning what could have been a cloyingly self-indulgent character into someone with a well-rounded personality and heart in spades. Radcliffe, meanwhile, is impressive as Wallace, and the supporting cast of Driver, Spall, Mackenzie Davis and Megan Park all have their moments in the spotlight. Dowse's What If may not live up to the sky high expectations it sets itself early on (it's certainly far from being the When Harry Met Sally of its time), but its intentions are resoundingly pure. This secures it as a rom-com that's far superior to the average - one that ties together a talented cast with script that's by turns perceptive, heartfelt and pleasurable.