Credit: Jason Merritt/Getty Images Photo: Kristen Bell and Dax Shepard at the 2012 CMT Music Awards on June 6, 2012

We bet that having a baby tops Kristen Bell’s sloth scale of emotions.

The House of Lies actress (who also voices Gossip Girl’s titular character) is expecting her first child with fiancé Dax Shepard, next spring!

“They’re so excited — they’re both ecstatic,” a close friend of the couple tells People. “They can’t wait to become parents.”

Dax — who has had plenty of practice parenting as goofy dad, Crosby Braverman, on Parenthood — put a ring on it nearly three years ago, but the duo won’t be tying the knot until same-sex marriage is legal in California.

“We're not going to have a party when half of our friends ... can't do that thing we're doing,” Dax told CNN in August. “We're not going to ask them to come celebrate a right they don't have. That's just tacky! Forget like anything else, it's like really tacky for us."

We’re guessing that the couple is celebrating now, especially since their friend says that Kristen’s pregnancy is going great.

“Kristen had a little bit of morning sickness early on but she just started shooting the second season of House of Lies and is feeling great now,” their friend added.

Congratulations to the happy couple! We’re secretly hoping they’ll name the baby Melon after Kristen’s beloved sloth friend.

Sources: People, CNN