Elvis Presley's granddaughter Riley Keough is engaged to her stuntman boyfriend Ben Smith-Petersen.

Petersen posted the photo on Facebook and wrote, "So that happened," and you can clearly see the starlet's gorgeous diamond engagement ring. The lovebirds met on the set of Mad Max: Fury Road in 2012, and a source tells Us Magazine, "They're very serious. They're perfect for each other."

While we're happy for the couple, let's also remember that Keough seems to have a thing for getting engaged to her co-workers -- and breaking it off! In March 2012 her Magic Mike co-star Alex Pettyfer popped the question, and though the two later broke up, they were spotted holding hands at The Butler premiere in Hollywood just last August. She's almost as all over the place as her mom Lisa Marie Presley!