ET can confirm the pair tied the knot on Wednesday night at their home in Bel Air, in a secret ceremony disguised as a birthday party for Theroux, who turns 44 on Aug. 10.
The intimate affair was held in front of 70 of their closest friends and family, including Howard Stern, Jason Bateman, Lisa Kudrow, Chelsea Handler, John Krasinski, Emily Blunt, Ellen DeGeneres and more. The couple's backyard was seen decked out for the elaborate party with a bar and beautiful tablescapes. Earlier in the day, a minister and a large cake topped with two Muppet-like characters were photographed entering the house by TMZ.
Aniston met Theroux in 2011, while vacationing with Friends co-star and real-life pal Courteney Cox and the couple have been together for four years. They announced their engagement in August 2012.
"He's the easiest guy to hang around," Aniston, 46, gushed to The Hollywood Reporter back in January. "He was so completely in his skin. It was the first time I remember being so comfortable [with a romantic interest], like with all my gay friends."
Aniston and Theroux shared the big screen in 2012's Wanderlust, but according to the actress, her new husband is a true Renaissance man.
"He's got a so many different talents, I have a lot to chime in on," Aniston told ET at a January 2015 press junket. "Not only is he a writer, he's also an actor and a director and all of those wonderful things. I make it easy. I just have a one-shot job."
"Not only is he a great actor but he's one of the best comedy writers out there," she marveled to Harper’s Bazaarlast November. "And he directs and paints murals. And I just think it's so attractive to be that good at so many things and to have no ego. He's one of the most humble, decent human beings."
The actress also couldn’t help but gush about her man’s physical attributes when Theroux covered Women’s Wear Daily last July.
"He's just so beautiful and handsome to me, and I love that his eyeballs are so beautifully captured because those eyes just knock me out every day," she said. "He just gets better every year. He's just like a lost gem in the sand, and he's just always been there and been brilliant, and now this is just in a different light."
Theroux has also been outspoken about his love for Aniston and how the couple has handled their relationship in the spotlight.
"We're just doing our own thing. We are completely happy, obviously, but we're not on anyone else's timeframe," he told Australia’s TV Week last fall. "I think love in anyone's life creates expansion. And needless to say, it feels really good. So it's only enriched by life."
Since they first became engaged, publications have speculated constantly about when the pair were tying the knot. Aniston even admitted that the pair couldn’t throw a party without friends wondering if it was secretly a wedding, which have been one of the most talked-about nuptials in Hollywood.
"It's funny actually our friends Sacha [Baron Cohen] and Isla [Fisher] have shown up for four parties, four little gatherings, about a year ago, they would show up in beautiful wedding wear," she said on The Ellen DeGeneres Show last November. "Even like the Fourth of July last year, they showed up and Sacha was in a powder blue suit and Isla was in a little cute dress. And we were like, 'Guys, it’s the Fourth of July, we're in cutoffs and eating hot dogs. We will actually let you know!'"
The actress told InStyle that she and Theroux struggled with the best way to tie the knot under the intense media speculation.
"There's a big discussion in our house right now: Do you just do it and say screw it? Or do you try desperately to get away with [a secret ceremony] where you don't have any fun because you're hiding in a cave somewhere?" she said in January. "If we could do it without all the buzzing and the noise... It can be done. Where there's a will there's a way."