updated 04/26/2011 AT 10:20 AM ET
•originally published 04/25/2011 AT 11:15 PM ET
Former Laguna Beach star Kristin Cavallari got one sweet surprise while on vacation in Mexico with her NFL beau Jay Cutler.
A source close to the couple confirms to PEOPLE that Cutler proposed over the weekend during their getaway in Cabo San Lucas.
“He surprised her with a quick trip to Cabo to ask her to marry him,” the source says.