Kellan Lutz's sister bribes professors?

The sister of New Moon star Kellan Lutz has reportedly been bribing her college professors with photos of her celebrity brother.

According to WENN, Lutz's sibling has been promising teachers signed photos of the actor in exchange for good grades.

The 24-year-old, who comes from a family with seven siblings, said that he's becoming his sister's favourite relative, but that he knows the ulterior motive behind her love.

"My sister is a freshman now... She was never really too serious [about studying] but for some reason she's getting As and Bs now because her professors are asking for headshots and she's coming to me like, 'Can you sign these?'"