Project Runway winner Christian Siriano and singer-songwriter Brad Walsh are engaged. Credit: Henry S. Dziekan III/

This wedding is sure to be fierce! Christian Siriano, winner of Project Runway's fourth season and a CFDA member, is engaged to singer-songwriter Brad Walsh, a rep for the fashion designer confirms to Us Weekly. The couple announced their engagement via Twitter and Instagram on Sunday, July 28. Bucking tradition, the future husbands opted to exchange engagement bracelets in lieu of rings.

"We both just decided on Saturday to go shop for engagement bracelets," Walsh tells Us. "We've been together six years, so it was pretty casual."

After winning Project Runway in 2008, 27-year-old Siriano launched an eponymous fashion line that has been worn by the likes of Stacy Keibler, Sarah Hyland and Christina Hendricks. Walsh, meanwhile, is working on a follow-up to his 2011 album, Right Now.

Siriano and Walsh currently reside in a 2,100-square-foot apartment in New York City's Chelsea neighborhood.