Robert Pattinson beamed from ear to ear when he walked into the Jimmy Kimmel Live studios in LA this evening. He made a low-key arrival wearing a Nike sweatshirt, though it seems he'll change into a Gucci suit to sit down with Jimmy. The Water For Elephants star is on the West Coast following his promotional appearances in NYC earlier this week. He kicked things off Sunday with Reese Witherspoon and Christoph Waltz at the world premiere, and later met up with his Breaking Dawn costar Kristen Stewart for a backseat PDA session. It's been a busy few days for Rob, who chatted with Ellen DeGeneres recently about "ass-baring" fight scenes and his "two-timing" love, Tai the elephant. Rob wasn't the only one to fall hard for his larger-than-life costar, as our IAHF winner quickly fell head over heels for the pachyderm too.