Robert Pattinson and Reese Witherspoon brought their UK press tour for Water For Elephants to The Graham Norton Show studios in London last night. The costars chatted about their new circus drama, and also shared space on the stage with fellow guests Shappi Khorsandi and House actor Hugh Laurie. Robert and Reese have been traveling all around Europe for the last few weeks to show off the film with screenings in Berlin, Paris, and Barcelona. Yesterday was their UK premiere of Water For Elephants, which they followed up with an afterparty at the Home House Private Members Club. They're certainly among the hardest-working movie stars — where do Robert and Reese rank on your PopSugar 100 list of all time favorite stars? Robert's real-life leading lady, Kristen Stewart, is also in the running in that category. She's had a busy few days too, staying in NYC to attend the Costume Institute Gala on the arms of Proenza Schouler designers Lazaro Hernandez and Jack McCollough.