Craig Sjodin/ABC
Patrick Gomez
August 27, 2015 05:15 PM

‘Til death – or ballroom dancing – do us part.

Alexa and Carlos PenaVega may have united in holy matrimony, but now the duo are facing off and making history as the first married couple ever to compete against each other on Dancing with the Stars.

“He literally rehearses right next door. So he’ll walk over to me and he’ll just give me a kiss,” Alexa – who is celebrating her 27th birthday today – told Entertainment Tonight of her husband on Thursday. “It’s just so encouraging. He is my teammate and my life partner, so I like that encouragement. I need it.”

Paul Hiffmeyer/Disneyland Resort

The former Big Time Rush star (née Pena) and Spy Kids actress (née Vega) combined their given surnames after their January 2014 wedding at the Grand Velas Riviera Nayarit in Puerto Vallarta, Mexico.

“We are so thrilled and blessed that we were able to have all of our close friends and family join us on our special day,” the couple – who will be writing weekly blogs for PEOPLE.com about their DWTS season 21 adventures – told PEOPLE at the time.

Before they became husband and wife, Alexa – who was a recurring guest star on Nashville last season – told PEOPLE the key to marriage is “compromise.”

But it also sounds like she’s not going to let her love for her husband, who will play Kenickie in Fox’s upcoming Grease: Live!, get in the way of her shot at the Mirror Ball trophy.

“There are compromises like where you want to eat, what color you want to paint the wall, but not who you are as a person,” she said of what she learned from her first marriage. “[But] never compromise yourself.”

RELATED VIDEO: Behind the Scenes of Dancing With the Stars

Season 21 of Dancing with the Stars, featuring newly engaged judge Julianne Hough, premieres Sept. 14 on ABC.

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