"Truly the luckiest girl in the world, cannot wait to marry this man!!!!" Palin, 24, captioned an Instagram pic of the couple kissing. In a second photo, she gave a closer look at her gorgeous cushion-cut diamond engagement ring.
Meyer, a U.S. Marine vet, received the Medal of Honor in 2009. "I'm definitely the luckiest guy ever to be able to spend the rest of my life with @bsmp2," the 26-year-old captioned his own Instagram pic of the future spouses. "#shesaidyes."
Days before the proposal, Palin shared a sweet photo of Meyer and her 6-year-old son Tripp, whom she had with ex fiance Levi Johnston. "My boys," she gushed. (Palin and Johnston were often photographed supporting former Alaska governor Sarah Palin during her vice presidential campaign in 2008.)
This will be the first marriage for Bristol. She and Johnston split in 2010, just weeks after announcing their second engagement. Johnston later welcomed daughter Breeze Beretta with his girlfriend Sunny Oglesby in September 2012. The couple married the following month.