AceShowbiz -

Andy Samberg is officially a married man. The former "Saturday Night Live" regular said "I do" to his longtime girlfriend, indie singer/songwriter/harpist Joanna Newsom, at the Post Ranch Inn in Big Sur, California on Saturday, September 21.

Guests included the groom's "Dick in a Box" collaborator Justin Timberlake and his actress wife Jessica Biel, fellow funnymen Adam Sandler and Nick Kroll, as well as comediennes Amy Poehler and Maya Rudolph. The latter came with her longtime partner, director Paul Thomas Anderson.

The bride donned a custom Zac Posen dress for the weekend star-studded nuptials. "It was magical. It was a full couture piece. It was custom and collaborative in design," the designer told E! News.

Samberg, 35, and Newsom, 31, announced engagement in February this year after dating for around five years. "So far, it's been nothing but stress and joy," he recently said of their preparation for the big day. "The joy is the lady herself. The stress is the planning. We tried to go small and it was just impossible. There's too many relatives, too many friends."

"Brooklyn Nine-Nine" co-star Terry Crews later spilled, "He's getting married this week. ... I gave him all my love, I let him know I've been married 24 years, so I'm like, 'Dude, be serious, this is real.' And he's like, 'I'm ready man, I'm ready.' That told me everything I needed to know about what a great guy Andy Samberg is."

Samberg was a fan of Newsom's music and had attended her live shows even before they officially met. A musician himself, the member of comedy troupe The Lonely Island said he would not dare to collaborate with her in fear of upsetting her fans.

He once joked to Glamour magazine, "We've talked about it. But we've decided ultimately that her fans would probably murder me in my sleep. What she does is so, like, actually beautiful and important."