Bollywood superstar Shah Rukh Khan has roped in Chinese-American actor Tom Wu for his home production "Ra.One".

"...a big welcome to Tom Wu in the film cast. He is so humble and such a sport... really nice to have him on board, " Shah Rukh, 44, posted on his Twitter page.

Tom Wu, a martial arts expert, was earlier seen in films like "Revolver", "Shanghai Knights", "Batman Begins" and "Tomb Raider II".

According to earlier reports, action legend Jackie Chan was approached for a role in the action flick.

"Ra.One" will also see Arjun Rampal and Kareena Kapoor. American singer Akon too is part of the crew as he recorded a song for the movie.

The film is expected to release in 2011.

Shah Rukh, who is currently shooting for the film in London, is a little unwell.

"Antibiotics have sucked all energy out of me. Throat feeling better now... can go on the sets and make some noise to feel important hopefully, " he wrote on his Twitter.