The outdoor nuptials took place in Santa Ynez, with the bride and groom standing under gorgeous pink flowers. Brittany Snow was one of Camp's bridesmaids, while fellow Pitch Perfect ladies Elizabeth Banks and Rebel Wilson were also in attendance.
Just hours before walking down the aisle, Camp took to Instagram to share her excitement over "the day of the show."
Wilson, Snow, and Banks were just as excited for their friends' big day, with the 36-year-old Australian actress sharing a pic with some of her castmates.
Wilson also sent the newlyweds a congratulatory Instagram after the ceremony.
Astin, 28, and Camp, 33, got engaged in January. They made their first appearance as a couple in June 2013.
While the pair couldn't be more thrilled about their wedding, Camp is already looking forward to their future.
"I'm really excited. I want to have kids," she said last month. "I'm ready to have a baby. I've worked a lot and I'm tired and I just want to stay and nest and be with Skylar and all that, which is something I'm really looking forward to."
"There will be a couple people there, there might be some people there who are our loving friends who we know from Pitch Perfect, so yeah, it's going to be a fun, big party event," she revealed. "There's going to be music, dancing, a band and hopefully all our friends will be dancing with us."