Neil Patrick Harris now a dad to twin boy and girl

"How I Met Your Mother's" Neil Patrick Harris is now a father!

On Friday, the actor, 37, announced on Twitter that he and his longtime partner, David Burtka, welcomed their twins — a boy and a girl — Tuesday.

"Babies!!" he wrote. "On 10/12, Gideon Scott and Harper Grace entered the Burtka-Harris fold. All of us are happy, healthy, tired, and a little pukey."

He announced he and Burtka were expecting in August.

"So, get this: David and I are expecting twins this fall," he revealed on Twitter. "We're super excited/nervous/thrilled. Hoping the press can respect our privacy..."

The babies were born with the help of a surrogate.