Doug Reinhardt, Jason Wahler Doug Reinhardt, Jason Wahler

Not one, but two of Lauren Conrad's ex-boyfriends made news Monday with news of their engagements.

Conrad's famous ex-boyfriend Jason Wahler, whom she dated on both Laguna Beach and The Hills, is engaged to girlfriend Ashley Slack.

Remember when Justin Timberlake had curls? Check out the most dramatic celebrity makeovers

Wahler, who most recently appeared on Celebrity Rehab with Dr. Drew in 2010, revealed the happy news when he shared a picture of Slack's engagement ring on Instagram."This is the first relationship I've ever been in sober," he told Us Weekly. "It's a little bit different when you're not drinking and going out. She's my best friend." The couple got engaged back in November and will wed on Oct. 12. Wahler was previously engaged to Katja Decker-Sadowski.

Doug Reinhardt, who dated Conrad briefly during Season 4 of The Hills, is now engaged to his high school girlfriend and fellow Hills alum Allie Lutz. Lutz, who feuded with star Kristin Cavallari during Season 6, tweeted about the happy news when she shared a picture featuring her engagement ring.

Reinhardt, a former baseball player for the Los Angeles Angels of Anaheim and the Baltimore Orioles, was also previously linked to Paris Hilton and Amanda Bynes.