Scarlett, Penn Can't Keep Hands Off Each Other

The May-November romance of sexy celebs Scarlett Johansson and Sean Penn is heating up. The two reportedly engaged in a slightly disconcerting super-hot make-out session smack dab in the middle of the White House Correspondents Dinner over the weekend. Scarlett, 26, couldn't keep her paws off 50-year-old Sean, even when he ducked out for a smoke, say tattletale witnesses. "She plopped down in his lap, and they were kissing. It happened right as the main course of the dinner was being put on the table," says one.

The one place always-bad-boy Sean refused to put his hand was over his heart—during the Star Spangled Banner at the start of the show, gripes the New York Post. Click for more on their "intense" PDA, and reports that they disappeared ... for an hour. (More Scarlett Johansson stories.)