Then: The oldest of the Jonas Brothers, 18-year-old Kevin joined Nick and Joe in celebrating the August 2006 release of their debut album, It's About Time. Sales proved disappointing, but the trio soon hit it big after a 2007 Hannah Montana guest stint and later, their own Disney Channel movie, Camp Rock.
Now: No more purity ring! Kevin, now 25, traded the group's most famous accessory for a wedding band in 2009 when he wed longtime girlfriend Danielle Deleasa. The two are expecting their first child and have another season of their E! reality show, Married to Jonas, on the way.