Complete This Sentence: The Strangest Celeb Couple Is...

Apparently, Sean Penn and Scarlet Johansson are over, but it's not the breakup that's gotten people talking: it's the fact that they got together in the first place. He's old, she's young. He's a crank, she's a fashionista. He's had a troubled past, while her personal life (pre-divorce) seemed a little vanilla. As a seasoned actor with a grizzly personality, he's the complete opposite of Ryan Reynolds, ScarJo's fratty funnyman ex.

Complete this sentence: The strangest celebrity couple is....