Actress Kaley Cuoco is missing out on filming hit U.S. show "The Big Bang Theory" after reportedly breaking her leg in a horseriding accident at the weekend. The star is currently in a Los Angeles hospital following a nasty fall, and will have to miss the taping of the popular sitcom on Tuesday night, September 14, according to TMZ.com.

Sources tell the website the rest of the cast would film without Cuoco and she is expected to catch up her scenes when she recovered. But if she is unable to return for filming next week, the show will have to be rewritten around her absence.

On "The Big Bang Theory", Kaley Cuoco portrays Penny, a beautiful, down-to-earth aspiring actress and employee at The Cheesecake Factory. In the show, she she moved to California from Omaha, Nebraska to pursue a career in acting.