Socialite Paris Hilton was caught kissing actor Paul Iacono, who stars in her brother-in-law David Katzenberg's new TV show The Hard Times of RJ Berger.
Aceshowbiz.com reports that the 29-year-old was photographed lip-locking with Iacono backstage at the MTV Movie Awards, Sunday.
"We thought it was a publicity stunt at first, but Paris was really making out with this guy," said a guest at the event.
Hilton further fuelled up speculation of her dating the actor with a post on her Twitter page. "My new boy toy is hot," she wrote.
However, if they are really together, the actor will be Hilton's first boyfriend since she split from reality TV star Doug Reinhardt in April.