Will it be a Gossip Girl? Or an Astro Boy? Actress Kristen Bell — of the aforementioned show and film, as well as “Veronica Mars” and “Forgetting Sarah Marshall” — is expecting her first child with fiancee Dax Shepard, People reports.

Actors Dax Shepard, left, and Kristen Bell at the 2012 Do Something awards in Santa Monica, Calif. The couple is expecting their first child in late spring, Bell's rep Marcel Pariseau confirms. (Jordan Strauss/JORDAN STRAUSS/INVISION/AP)

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

The actress, 32, and actor, 37, have been engaged for nearly three years.

Let’s hope that Shepard’s role in NBC’s “Parenthood” has prepped him well for this new challenge. Perhaps Bell can decorate the nursery with sloths?

View Photo Gallery: Births and pregnancy announcements from excited parents and parents-to-be.