-- Reed Robertson is officially off the market.
"I couldn't be more excited to marry this amazing woman," he wrote next to a photo of himself handing her a ring. "My fiancé is a babe in every way."
Thompson added in her own post: "This is my fiancé Reed, he told me he loves me so much he's giving me his last name. And I said YES!"
According to People magazine, Robertson, the 20-year-old son of Jase and Missy, proposed during a family trip to New York City.
While in Central Park, he got down on one knee and popped the question with a 3-carat stone that had been an heirloom in her family.
"I wanted to do it before Christmas because I knew she thought it was happening then, and I wanted to make sure she was surprised," Robertson told People.. "We are so excited to start our lives and our family together as we enjoy this unforgettable period of time."