The 26-year-old actor and 27-year-old actress announced the news Thursday on social media. The couple, who were born Carlos Pena and Alexa Vega, married in 2014 and blended their surnames after their wedding.
"There is going to be a new cool kid in town... And by cool I mean dorky just like their father. A little PenaVega is on the way!!! #ItsHappening #HolyWow #Imgoingtobeadaddy," Carlos wrote on Instagram.
"I cannot believe I finally get to say this... we're pregnant!!! It's #ClearblueConfirmed that a little blessing is joining the PenaVega family!!! We can't wait!!! #ItsHappening #HolyWow #LosForDaddyOfTheYear," Alexa added on her own account.
"I love him so much," Alex wrote of Carlos in a blog post during the competition. "We just have such a strong and amazing relationship. I couldn't have asked for a better journey than to be doing this with him."
Carlos previously told Latina magazine he and Alexa are "life friends" who "love just being with each other." The actor is known for playing Carlos Garcia on Nickelodeon's Big Time Rush, while Alexa portrayed Cameron Cortez in the Spy Kids movies.
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