Robert Pattinson celebrates birthday with Kristen

Robert Pattinson turned 25 yesterday (May 13). Guess who joined him to bring in his birthday? No prize for guessing. It was none other than his rumoured girlfriend Kristen Stewart, his co-star in the Twilight series.

The Twilight star reportedly celebrated his birthday with Kristen in Toronto before shooting his next film Cosmopolis opposite Canadian actress Sarah Gadon. He is also acting in Water For Elephants, which has Reese Witherspoon in the female lead role.

Robert Pattinson and Kristen Stewart have not made their relationship public but speculations are doing the rounds that they are an item. They were spotted getting cosy even in public. Robert has even hinted that he is in a relationship.