MARY-KATE OLSEN, JASON SUDEIKIS GETTING COZY

Jason Sudeikis is one popular dude...in the press, at least!

First, the 36-year-old actor was linked to Ashley Olsen when he reportedly "snuggled" with her during a Tower Heist afterparty hosted by Brett Ratner Monday in NYC.

The only problem is that it was actually her twin, Mary-Kate, that he really was getting friendly with at the fete.

"Mary-Kate was spotted with Jason at the Stone Rose Lounge," a source tells me.