U.S. reality Tv star Jason Wahler has married his model girlfriend a day before his ex announced her engagement.

The former The Hills star, who previously dated reality show favourite-turned-fashionista Lauren Conrad, wed Ashley Slack in front of 180 guests in Malibu, California on Saturday (12Oct13).

And on Sunday (13Oct13), Conrad announced her engagement to law student William Tell.

Wahler and Slack got engaged last November (12), and Conrad has now started making plans for her own wedding.

In a post on her blog, she wrote, "I am very excited to share with you guys that William and I got engaged over the weekend. I am beyond thrilled!"

She also shared a snapshot of her new diamond ring and promised to keep fans updated with her wedding plans, adding, "Get ready for lots more wedding content as we begin the planning process."