No, this isn’t Scarlett Johansson’s cute new extramarital toyboy. It’s her twin brother, Hunter, who escorted the Lost in Translation beauty to last weekend’s annual White House Correspondents’ Dinner in Washington.

The photogenic twosome attended the 2010 dinner at the ritzy Washington Hilton Hotel on Saturday.

Although the lesser known Johansson, Hunter had no problem fitting in, as he has known President Obama since he worked as his campaign organizer a few years ago.The hottie was also profiled in PEOPLE Magazine’s “Single and Sexy Men of 2008″ issue.

Hey, maybe being the unfamous sibling ain’t so bad after all.