Christina El Moussa Pregnant, Expecting First Child with Husband Ant Anstead

Christina El Moussa will have to get to work designing a new baby nursery, because she's pregnant!

The "Flip or Flop" star and new husband Ant Anstead are expecting their first child together, the couple confirmed via an Instagram post on Friday morning. "@ant_anstead and I are so excited to announce #babyanstead coming this September," she captioned a photo of the two showing off an ultrasound. "The kids are all so excited to meet their new sibling ♥️ #5 #Gonnaneedabiggercar!"

Christina already has two children from her marriage to ex-husband Tarek El Moussa; Taylor, 8, and Brayden, 3. Anstead also has two teenage children -- daughter Amelie and son Archie -- from a previous marriage.

Ant's baby announcement included all four kids:

The couple said "I do" with a surprise wedding ceremony in late December 2018, telling guests they were simply all meeting at their home in order to catch a charter bus over to the Newport Beach Christmas Boat Parade. Instead, a wedding ceremony followed.

All four of the couple's kids had a role in the ceremony. "It's the six of us," said Christina. "We're a blended family so it was really important for them to be a part of it."

As for her ex, Tarek, he didn't know about the wedding until it happened. "I was sitting on the couch and then I started getting texts from people showing me a photo online of her wedding," he previously explained. "That's how I found out."

"I just sat there for a few minutes and thought about things, and it was kind of like a release," he added. "It was kind of like, I was really okay with it. I was happy with it." Tarek also said he wished them congratulations via text message that same night.