It was date night for Laura Prepon and Ben Foster at the Sundance Film Festival in Park City, UT, on Saturday. The pair, who got engaged back in October, was on hand to celebrate Laura's new film, The Hero, which also stars Krysten Ritter and Nick Offerman. The couple showed subtle but sweet PDA as they smiled and stared into each other's eyes. This is the first time we've seen Laura and Ben at a high-profile event in a little over three months. The last time they hit a red carpet together was at the premiere of Inferno in Italy in October.