Neil Patrick Harris tied the knot to longtime love David Burtka!

Prince William & Kate Middleton Expecting Second Baby

"Guess what? @DavidBurtka and I got married over the weekend. In Italy. Yup, we put the 'n' and 'd' in 'husband'," the former How I Met Your Mother actor tweeted on Monday.

E! News reported that the wedding was officiated by How I Met Your Mother director Pamela Fryman and singer Elton John performed for the guests. Both the Tony winner and Burtka sported custom Tom Ford tuxedos.

Get The Details On Angelina Jolie's Wedding Gown

Harris, 41, and Burtka, 39, started dating more than 10 years ago and are parents to twins Gideon and Harper. The pair's boy and girl will celebrate their fourth birthday on Oct. 12.

Harris, who this year won the Tony Award for Best Actor in a Musical for Hedwig and the Angry Inch, opened up about the joys of fatherhood last year.

"The older they get, the more I love being a dad. Now that they're talking, I'm really loving the camp counselor end of parenting. I think that's where my strengths lie," he told USA Weekend"I'm all about reasoning. If they fall and are OK but crying, David will be the hugger, and I'll be the 'Show me where it hurts; let's talk about it' one. I come from a family of lawyers, so explanation is crucial."