Hairspray star Amanda Bynes has sparked rumours she is dating Family Guy creator Seth MacFarlane - after they were spotted enjoying a night out together in Los Angeles.

The TV writer, who split from his girlfriend Eliza Dushku earlier this year, was reportedly seen embracing the 22-year-old actress at an L.A. party, and subsequently leaving with her.

A source tells the New York Daily News, "They came separately but when she found Seth in the crowd, they huddled up and chatted. She giggled a lot."

"He walked out probably five steps in front of her but, clearly, they were leaving together."

MacFarlane recently became the highest-paid series creator in TV, signing a $100 million deal with 20th Century Fox.