Riley Keough and Ben Peter-Smith

Riley Keough and Ben Smith-Petersen attend the "Foxcatcher" party during the 67th Cannes Film Festival on May 19, 2014, in Cannes, France. 

David M. Benett/Getty Images for Foxcatcher

Lisa Marie's daughter, Riley Keough, is engaged to Ben Smith-Petersen.

Happy news from the Presley dynasty: Riley Keough, granddaughter of Elvis Presley, is engaged to be married.

Unlike mother Lisa Marie Presley -- who has two children with musician Danny Keough and two with music producer Michael Lockwood -- Riley is marrying outside of the music industry. Her fiancé, Ben Smith-Petersen, is an Australian stuntman. He worked on the upcoming franchise reboot Mad Max: Road Fury, a film starring Riley Keough. People speculates the two met on set. 

Riley Keough Strips Down for Aussie Underwear Campaign

Keough was previously engaged to Alex Pettyfer, whom she worked with in Magic Mike. Just last year, she had a steamy make-out session with Justin Timberlake… for his "TKO" music video.