Kristen Stewart and Robert Pattinson may keep their relationship under the radar, but there was no hiding their affection after last night's premiere for Water For Elephants in NYC. We were live from the red carpet as Robert and Reese Witherspoon chatted with us about the film, but later he and Kristen were seen ducking out together — he even went in for a kiss! Watch their PDA moment, and then check out his chemistry with costar Reese.