Taylor Lautner admits he'd be scared if girlfriend Taylor Swift wrote a song about him.

The 'Twilight Saga: New Moon' star knows his new beau is famed for penning tunes about her life but says he's not sure if he would comfortable being the subject of one.

He said: "That's a scary thing. I don't know if she has. I have no idea."

During a recent interview, 'Love Story' singer Taylor refused to confirm speculation the pair - who are starring in a new movie together 'Valentine's Day' - are dating but admitted the 17-year-old actor was "amazing".

She said: "He's an amazing guy and we're really close...and ah....yep.....and we're in a movie together and I am really excited about seeing it."

Taylor and Taylor were first spotted together at a Los Angeles Kings hockey game last month and she has since introduced him to her mother.

She recently admitted: "I love him, he's so cute."