Jennifer Aniston and Justin Theroux Tie the Knot

The couple reportedly said "I do" before family and friends at their Bel-Air, Calif., mansion.
4:23 | 08/07/15

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Transcript for Jennifer Aniston and Justin Theroux Tie the Knot
? ? ? ? welcome back to "Gma." Time for the "Heat index" and this morning's hot button. That surprise wedding, Jennifer aniston and Justin Theroux tie the knot in a secret ceremony. Linsey Davis has the story. Reporter: It's the biggest secret wedding ever, after a three-year engagement and constant guessing about just when they would finally tie the knot, Jennifer aniston and Justin Theroux made it official Wednesday night. The Hollywood power couple getting married in the backyard of their Bel Air home. The yard made into a casual lounge with cozy nooks, ottomans, a raised stage. More than 70 guests were invited including former cast mates and longtime friends Lisa kudrow and courteney cox. As well as Ellen DeGeneres and her wife Portia and comedians Chelsea handler and jimmy Kimmel. They all thought they were invited to are a birthday party for Justin instead treated to a surprise. Kourtney was the maid of honor and Scott Campbell the best man. The nuptials a happy ending for America's favorite friend. We were on a break. Reporter: After splitting from brad Pitt in 2005. The actress was linked to funnyman Vince Vaughn on the set of "The breakup" and later had a romance with John Mayer but the slow burn, Justin and Jennifer meeting on the set of "Tropic thunder" not romantically linked till 2011. Shortly after they teamed up on the set of "Wanderlust." They are row capturing anistaniston's heart. The couple kept their friends and family guessing about a wedding. Something aniston joked about with pal Ellen DeGeneres. Our friend, four party, four little gatherings about a year ago, they would show up in, you know, beautiful wedding wear. We were like, guy, it's the fourth of ly. We're in cutoffs eating hot dogs. We will actually let you know. Reporter: Now the wait is over. But the honeymoon is just beginning. The newlyweds spotted boarding a private plane for bora bora on Thursday. For "Good morning America," linsey Davis, ABC news, New York in they are going far away for the honeymoon. Let's bring in the executive editor of "People" magazine. Kate Coyne. They were looking for the right moment with their work schedules, when their friends were all in town. They were very motivated by when they thought they could get away with it. You know, they were walking this sort of tightrope between wanting an actual real wedding, not something that was super duper casual and last minute but also not wanting to do the big George and Amal blow-out that would have drawn a ton of attention and photographers camped out for days. It's a balancing act and had to find the sweet spot which clearly they did. We heard Jen say, don't worry, friends, I will let you know. But -- Not so much. No. No. You know, she seemed to pull it off a little bit because from what we can see of people arriving, nobody was in cutoffs and t-shirts. They all knew, come on. People were dressing up and there was -- there was a lot of sort of smoke and mirrors because it was Justin's birthday so she has celebrated that this time roughly every year. I know because this time roughly every year we have watched that birthday party to see if it would turn into a wedding so I think shy probably let people be as suspicious as they needed or wanted to be this time around and it paid off if you wore your nice clothes to the birthday barbecue. People arrived and didn't leave. Reports are that courteney cox, her maid of honor stayed till 3:00 A.M. She was one of the last guests to leave. You go, girl. Apparently I think sol of her friends were not sure if it includes courteney cox headed off to bora bora with them. That's what we know about the honeymoon is bora bora. And I don't believe it's going to be just the happy couple the entire time. I think the party will continue down there. I like friends like that. Sounds great. We're so happy for them. Congratulations, even though you can't hear us because you're in

This transcript has been automatically generated and may not be 100% accurate.

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