'Project Runway' Alum Christian Siriano Marries Brad Walsh

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Congrats to Christian Siriano and Brad Walsh!

The 30-year-old designer and his longtime partner said "I do" in a beautiful white wedding on Saturday afternoon.

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The couple posted several adorable snaps to Instagram as they geared up for the big day.

"It's happening!!!!!! Only a few days until @bradwalsh and I are married, and we are celebrating a little early!" Siriano wrote on Thursday. "Thank you @freixenetusa for the bubbly to ease the nerves."

"Solemnly swearing the information on our marriage license application is accurate," Walsh hilariously posted the next day.

"The face @bradwalsh is making sums up this moment of me doing seating for our wedding! Just love," Siriano added.

And of course, the designer was nothing but fabulous when the day finally arrived. "It's #wedding day!" he posted to Instagram on Saturday morning. "Love you @bradwalsh."

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Guests -- which included Jackie Cruz, Jay Manuel, Alicia Silverstone and Kelly Osbourne -- shared their own snaps from the big day, with the hashtag #sirianowalsh.

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Siriano's career as a designer has been on the up and up lately. See more on the Project Runway alum in the video below.