The Challenge Stars Welcome First Baby Together as They Compete Against Each Other in Season 41 Finale

MTV stars Olivia Kaiser and Theo Campbell have officially welcomed their first child to the world, according to Olivia’s Instagram post.

via: EW

The Challenge stars Olivia Kaiser and Theo Campbell have welcomed their first baby together, as they compete against each other in the season 41 finale that is currently airing.

The reality TV stars announced the birth of their son, Atlas Kaiser Campbell, on Thanksgiving in an Instagram post, revealing he was born two weeks early on Nov. 20.

"Welcome to the world, baby Atlas," Kaiser wrote in the caption of the shared post. "Born 5 lbs 5 oz, 19 inches long, two weeks early and simply perfection. Our little love is finally here, and he is the sweetest, calmest baby you’ll ever meet. We are so grateful and so in love. I can’t wait for this beautiful new chapter in our lives."

Kaiser, 33, also gave "a huge shout-out to all the mothers out there."

"Birth is NO JOKE," she added, promising that "my birth story [is] coming soon."

Check out their announcement below:

Campbell, 34, is also father to son Aries, who he shares with his ex Sapphire Yhnell.

Kaiser first debuted on the U.S. version of Love Island, while Campbell debuted on U.K.'s Love Island, before they both transitioned over to The Challenge. They met and fell in love on The Challenge season 40, Battle of the Eras.

While they broke up after that season finished filming, they reunited and began dating again during the currently-airing season 41, Vets and New Threats.

It has been rumored by multiple season 41 cast members that Kaiser became pregnant during season 41 filming, with Derek Chavez commenting on the Instagram post, "Just so yall know. He was conceived on my bday." (Chavez's birthday was celebrated in an early season 41 episode with a pool party.)

Both Kaiser and Campbell made it to the final this season. They are currently paired with different partners and competed against each other in part 1 of the final (aired on Wednesday), but host T.J. Lavin introduced a twist at the end of the episode that revealed they could "stake a claim" on anyone's partner for the second half of the grueling race. Campbell considered potentially ditching his current partner, Adrienne Naylor, to team up with Kaiser so they could win as a couple.

Neither Campbell nor Kaiser has won The Challenge in their previous attempts, despite coming close to earning the title of champion.

The Challenge: Vets and New Threats airs part two of the finale on Wednesday at 8 p.m. ET/PT on MTV.