Openly gay actor Neil Patrick Harris and his partner, celebrity chef and part-time actor David Burtka, are expecting twins.

Harris tweeted the news Saturday to his thousands of followers.

“So, get this: David and I are expecting twins this fall,” he messaged. “We're super excited/nervous/thrilled.”

“Hoping the press can respect our privacy...” he added.

Harris is the leading man of CBS' How I Met Your Mother. In the situation comedy he plays heterosexual sex hound Barney. But four years ago, after relentless outing by celebrity blogger Perez Hilton, the actor announced he's gay.

The thirty-seven-year-old actor has said he knew he was gay at about fourteen.

In a 2008 interview with gay glossy Out, Harris talked about being inspired by The Real World: New Orleans cast member Danny Roberts.

“I think before him I'd never seen anyone wear [being gay] so comfortably,” he said. “He was around my age. I could look at him as a role model – if you could say that, even though he was on a reality show. He represented a way that I could behave and stand tall comfortably without being an overt advocate and without being someone hiding in the shadows, I like that.”

Harris and Burtka entered a domestic partnership in 2004.

Harris has been nominated for three Emmy Awards for his work on How I Met Your Mother and a guest appearance on the Fox musical comedy hit Glee.