Last month they fuelled speculation they had already wed after they were seen sporting rings that appeared to be wedding bands.
However it appears that Twilight star Nikki Reed, 23, and her American Idol boyfriend Paul McDonald married on Sunday.
The couple, who only met in March, exchanged vows in front of 100 family and friends in Malibu, California.
The actress told US Weekly: 'We couldn't be happier.We were surrounded by our family and friends. We're so glad this day has come.'
The actress and her singer beau, 27, became engaged in June after just two months of dating and have enjoyed somewhat of a whirlwind romance to the altar.
Reed, who plays Rosalie Hale in the Twilight franchise, met singer-songwriter and season 10 American Idol contestant McDonald on the red carpet at the premiere of Red Riding Hood in March 2011.
It was instant attraction as the twosome were soon dating, and quickly set up home together.
Last month the couple were seen taking their dog Marlo for a walk in the Hollywood Hills and fuelled speculation that they had already married as they were wearing wedding bands.
At the time a representative for Paul said: 'Nikki and Paul got rings a few weeks ago while in Washington, D.C. Paul wanted to wear one while he's on tour and away from Nikki, as a way to feel close to her while they're apart. They aren't married yet.'
The moment they met was captured for posterity on an American Idol episode as part of a film that showed the contestants attending the premiere.