MTV -- "The Hills" stars Heidi Montag and Spencer Pratt tied the knot on Thursday in Cabos San Lucas, Mexico, according to Us Weekly. "The minute we said our vows, I couldn't stop crying," Montag revealed to the magazine.

The couple eloped after getting engaged last year. In his vows to the 22-year-old Montag, Pratt, 25, reportedly said, "Heidi, from the moment you came into my life, I knew my life would never be the same without you. You are the light in my life like the sun to the Earth! Your loving warmth makes me want to be a better person. Being with you, I feel complete. I'm honored to even be able to call you my wife. You are the most amazing, loving and caring woman on this planet. I will love you forever and always."

Montag's mother was not in attendance, but before going to the altar, her daughter dropped a hint. "I called her right before the ceremony, sort of hinted that something [was happening], but her reaction was to ask me if we were breaking up!" Montag said. "I told her it might be something else, and she said, 'Well, if you ever plan on getting married, just know that your stepdad is really upset that you want your father to walk you down the aisle."

The reality-TV star spoke to the magazine before breaking the news to her mother. "She was starting so much drama, it kind of pushed me toward wanting to get married without that," she added. "I don't know when I'll tell her."

Montag and Pratt are no strangers to drama. After he convinced her to move in with him, she and "Hills" star Lauren Conrad had a falling-out. Shortly after Pratt proposed, the couple took a break from their engagement. "I'd just turned 21, and it was scary because I was so young," Montag told Us following the split.

But they decided to try again in May after a vacation in Mexico. "Heidi read me biblical passages like 'Honor thy wife,' " Pratt explained. "I'm ready to marry Spencer," Montag told the magazine in a previous interview. "He's my soul mate."