Krista Kennell/Sipa Press
His famous father is very recognizable, but we don't see this teenage son on the Hollywood scene very often.
In fact, his legendary father even has his own reality series, but we've never seen his kid on the show. (Not that the setting would be suitable for children!)
But it seems last night was the exception as the 19-year-old accompanied his dad and girlfriend to the premiere of Iron Man 2. And who is this mystery man?