Biden, 73, officiated the nuptials of two longtime White House staffers, Brian Mosteller and Joe Mahshie. The newlyweds tied the knot at Biden’s home at the U.S. Naval Observatory in Washington, D.C., his office said, according to CNN.

The former Delaware senator posted a photo on Twitter on Monday, writing, “Proud to marry Brian and Joe at my house. Couldn’t be happier, two longtime White House staffers, two great guys.” MORE