Washington, August 1 : Actor Shia LaBeouf stunned guests at a charity bash after writing out a cheque for 10,000 dollars in Los Angeles, it has emerged.

The Transformers star was attending the Riders for Health auction proceeds from which will go to the international non-profit that provides health-care to rural African villages using motorcycles.

The 23-year-old bid for items including a 3,000 dollar hand-painted racing jacket and a 2,500 dollar helmet.

"He was the talk of that party!" Contactmusic quoted a source as telling America''s Star magazine. (ANI)