Robert Pattinson is worried that his rumored girlfriend Kristen Stewart will end up falling in love with their Twilight costar Taylor Lautner, it has been claimed.
A source told American tabloid Star that Lautner, 17, â€œdefinitely has a crush on Kristen. She treats him like a little brother.â€
The publication also claims Taylor and Kristen, 19, were â€œinseparableâ€ during the Teen Choice Awards in Los Angeles Sunday.
Kristenâ€™s close relationship with the bulked-up teen, the insider says, has Rob running scared.
â€œRob is really nervous that Kristen will fall for Taylorâ€™s charms,â€ a source said.
So itâ€™s no wonder the 23-year-old British actor is doing his best to keep hold of his woman.