September 17, 2015 11:55 AM

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This is one house guest they’ll be welcoming with open arms!

Big Brother alums Brendon Villegas and Rachel Reilly are expecting their first child, the couple revealed Wednesday.

“We’re so excited for this new adventure! After competing on four reality shows we feel like we’re prepared for this new challenge. We found a way to make another lifelong alliance member and we couldn’t be more overjoyed,” the couple tell PEOPLE exclusively, adding that Reilly is due in the spring. “We knew we had to announce it on the show that brought us together! We can’t wait for the Brenchel Baby to arrive.”

While joining Julie Chen live on stage to comment on the current season, the parents-to-be shared a secret of their own.

“Well, you know, Julie, how I say no one comes between me and my man … except a Brenchel baby!” Reilly revealed as the audience cheered.

After congratulating the couple on their future addition — who already has its own hashtag, #BabyBrenchel, in honor of Villegas and Reilly’s infamous alliance — Chen gifted the reality stars with a special present.

“We have a little onesie for baby Brenchel, just a little suggestion for a name, potentially,” Chen says.

The couple first met on season 12 of the hit show in 2010, before returning to the house for a second time — where Reilly won! — the following year. They later appeared as a couple on two seasons of The Amazing Race.

Villegas, 35, and Reilly, 30, were married in September 2012 atop the AT&T Center in downtown Los Angeles after the bride arrived on a helicopter.

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— Anya Leon with reporting by Patrick Gomez

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