Nothing brings two comedians together like being able to joke at one another's expense. Source: Kevin Mazur / Getty At Netflix's roast of Kevin Hart this weekend, the actor and comedian's longtime nemesis, Katt Williams, came out as a surprise guest. This moment served as the end to their years-long public feud, but only after Williams threw out several jokes at Hart's expense. "I'm surprised they invited me," Williams began after being introduced by Regina Hall. "That's how little star power you have. They had to start inviting your enemies. I said, 'I hate him.' They said, 'Come anyway.