Vice President Joe Biden officiated his first wedding ever -- and it was for a same sex couple. 
 
 Biden officiated over the wedding of two longtime White House staffers, Brian Mosteller and Joe Mahshie, at the Naval Observatory on Monday, his office said. 
 
 Posting a photo of the ceremony on Twitter, Biden wrote, "Proud to marry Brian and Joe at my house. Couldn't be happier, two longtime White House staffers, two great guys." 
 
 Proud to marry Brian and Joe at my house. Couldn't be happier, two longtime White House staffers, two great guys. pic.twitter.com/0om1PT7bKh — Vice President Biden (@VP) August 1, 2016 
 
 His office said the vice president obtained a temporary certification from the District of Columbia to preside over the wedding ceremony, which was attended only by the grooms' families. 
 
 Biden's wife, Jill, later tweeted: "Love is love!" 
 
 The Vice President publicly endorsed same sex marriage in 2012. 
 
 ABC News' Arlette Saenz contributed to this report.
– The wedding of two White House staffers was extra special Monday, and not just because the vice president was in attendance. Joe Biden was actually the one to pronounce the couple husband and husband as he officiated his first ever wedding, reports ABC News. The couple—Brian Mosteller, the director of Oval Office operations, and Joe Mahshie, Michelle Obama's trip coordinator—specifically requested him, reports BuzzFeed. "Proud to marry Brian and Joe at my house. Couldn't be happier, two longtime White House staffers, two great guys" Biden tweeted alongside a photo of the ceremony. The wedding took place at the VP residence at 4pm, with only family present.