Pattinson 'threatened by Lautner'

Robert Pattinson has expressed concern about how close his Twilight co-stars Kristen Stewart and Taylor Lautner are becoming on set, reports claim.

Pattinson, who is rumoured to be dating Stewart in real life, is apparently threatened by her developing relationship with Lautner on the set of the vampire franchise's third instalment Eclipse.

An insider told Star: "[Lautner] definitely has a crush on Kristen. She treats him like a little brother."

The source added that Pattinson's jealousy results in him buying lots of presents for his leading lady, saying: "He looks for rare, vintage things which he knows Kristen likes."

Stewart recently said that she is so close to Lautner that she would "kill" for him.