Robert Pattinson took a seat in a train car on the set of Water for Elephants in Fillmore, CA yesterday. He flashed his eye-catching pearly whites which stood out against his rugged, dirty wardrobe that we are already loving. Later in the afternon, he was joined by Reese Witherspoon and his other famous costar Tai the elephant. While Robert is getting to work on his new project in his super cute haircut, the Eclipse promotional push is going strong. We have one month to go until the June 30 release and we're getting excited with soundtrack music videos, new posters and of course sweet interviews like Rob's stop by Ellen this week. Robert is also going strong in the PopSugar 100 finals against Sandra Bullock — click here to cast your vote!

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Zac Efron returned to the set of Charlie St Cloud in Vancouver on Friday.

Robert Pattinson flashed his sexy smile on set in Fillmore Thursday.

Diane Kruger was animated this morning during an interview in Cannes. She was fresh-faced and lively despite an evening of partying yesterday, when she attended the star-studded amfAR charity gala with Ryan Gosling, Jennifer Lopez, and more. Kirsten Dunst also joined in the charitable good times last night, and she too was up today for a stroll along the water. Kirsten is in France to screen a short film she directed called Bastard, after spending time in Canada recently shooting Upside Down with Jim Sturgess. She's lined up another costar in Kristen Stewart, as both girls have signed on for roles in On the Road.

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Jake Gyllenhaal was the main attraction last night at PopSugar's private screening of Prince of Persia — though he kept those famous abs under wraps! Meanwhile, Jennifer Lopez watched as Ryan Gosling auctioned a kiss in Cannes, and Ed Westwick shares his love for Sex and the City!