He appeared on Conan O'Brien's show and shared the news, reports eonline.com
"Two (kids) under two is tough," he told the comedian before adding: "Yeah, a lot of estrogen. It's like an American Girl doll took a s--t on my life."
The couple recently welcomed their second child into the world but have remained private about any details surrounding the new arrival.
In January 2015, they became parents for the first time after the Gossip Girl star gave birth to daughter James.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)