Jake Gyllenhaal [1] was spotted on the set of Nocturnal Animals on Tuesday in LA, where he showed off his sexy smirk in between scenes. Wearing a plaid shirt and sporting a scruffy beard, Jake had a mountain-man look going on while filming alongside costar Isla Fisher [2]. The on-set moment comes just a few weeks after Jake made some fun late-night appearances. First he offered a hilarious response to Amy Schumer's cake-eating confession [3] when he sat down with Stephen Colbert [4], and then he was measured by Conan O'Brien [5], who hoped to solve the mystery of Jake's height [6] once and for all. Keep reading to check out more pictures of Jake Gyllenhaal on set, and then see his sexy appearance [7] at last month's Everest premiere in LA.