Neil Patrick Harris' Twins: a Boy and a Girl!

Neil Patrick Harris

Just days after announcing he's going to become a father, Neil Patrick Harris revealed the sex of his twin children: a boy and a girl, UsMagazine.com reported.

Harris and his longtime partner David Burtka will welcome twins via surrogate this fall.
"We're super excited/nervous./thrilled", 37-year-old 'How I Met Your Mother' star wrote on his Twitter page over the weekend.
According to Popeater quoting a close source, the biological father is Neil, but that information wasn't made public. "He is the driving force in the relationship and seems to make all the big decisions, however it's impossible to really say", the source said.
Harris' costars Alyson Hannigan and Cobie Smulders both welcomed daughters in spring 2009.