Britney Spears' kids could be uprooted to the opposite side of the US, if ex-hubby Kevin Federline gets his Broadway dream. The former back-up dancer and aspiring hip-hop artist is in talks about making his stage debut in Legally Blonde, according to one US magazine. As he has physical custody of their two sons, Sean (2) and Jayden (18 months), both could be joining him in the September move from Los Angeles to New York. K-Fed, who is presently and very publicly fighting a bitter custody battle with Britney, is said to be "excited" about being involved in the musical adaptation of the hit movie, which starred Hollywood hottie Reese Witherspoon. According to his other ex Shar Jackson, he is now launching into an exercise regime to get stage-fit after recently piling on the pounds. He's set to test his singing and dancing skills in a trio of roles in the show, including one as a postman, and what's more, despite K-Fed's ugly battle with Britney, her parents are reportedly supporting his dreams. "This is his chance to show the world what he can do," said one close friend. "This is his dream and he wants to bring the kids with him. Jamie and Lynne Spears have promised to help him make it work." And, K-Fed may not be the only star hitting Broadway - new mum Nicole Richie has been also reportedly approached to star in Chicago. Pictures by Splash News