Taking to her Instagram account, Audrina shared the happy news with her followers, before revealing the full details about the proposal on her blog.
The professional BMX star surprised Patridge as they dined out at Summit House in Orange County, California, hiding the ring in a desert tray.
On her blog, Audrina shared further pictures of her sparkling new diamond ring, as well as a link to the full report on People online.
33-year-old Corey apparently asked Patridge’s father for his permission to marry the reality star, before getting down on one knee during a dinner date.
‘When Corey found out he told my brother what his plan was and they sat in the dining area so I wouldn't see them,’ Patridge says. ‘Corey pulled it off pretty well. Although I noticed he didn't really eat dinner.’
Audrina, 30, is in good company too, as her Hills co-stars Lauren Conrad and Kristin Cavallari have both settled down in the past two years, putting their previous romantic dramas behind them.
Meanwhile co-star Whitney Port married her boyfriend Tim Rosenman just this month, showing off her beautiful wedding dress to fans on social media.
Patridge famously started dating Corey after giving up on bad boy Justin 'Bobby' Brescia.
Congratulations to Audrina and Corey!