Robert Pattinson had his hood and sunglasses on as he made his way through LAX today. He was in London spending time with girlfriend Kristen Stewart, and the duo were both spotted coming out of her apartment on Saturday. Rob popped over to the UK to visit Kristen after traveling to France and Belgium to promote Breaking Dawn: Part I with Ashley Greene. Their costars Jackson Rathbone and Nikki Reed took over press most recently with stops in Spain and Italy. The entire Twilight cast will soon join Rob on the West Coast, since they have junket duties to take care of this weekend. Before they sit down with the media, Robert, Kristen, and Taylor Lautner will also get together for their special Hollywood handprint ceremony on Thursday.