Well, we all know that Sean Penn is a womanizer, but what we didn't know is that Natalie Portman might be dumb enough to fall for his womanizing!
According to Star, an eyewitness walked in on the canoodling couple!
Following a touchy-feely dinner at the Sunset Tower Hotel's Tower Bar on March 17th, the pair snuck off to a semi-private area, where the witness spied them making out.
He's, like, 20 years older than her - and still married!
We sure hope this is not true.
[Image via WENN.]