'I Am Number Four' trailer: Dianna Agron and a cute alien boy

Dianna Agron is totally winning the race to turn "Glee" stardom into a movie career.

Agron, who has a smallish role in "Burlesque," steps up to female-lead status with the sci-fi flick "I Am Number Four," which hits theaters in February and which released a new trailer on Tuesday (Dec. 7). She plays Sarah, a high-school girl who falls for new kid John Smith ( Alex Pettyfer), with complications ensuing.

Photo/Video credit: DreamWorks