Riley Keough and Ben Smith-Petersen are happily engaged!

Elvis Presley's granddaughter and her stuntman boyfriend made the official announcement on Facebook by posting a romantic selfie, looking very much in love.

Last August 13, Petersen took to social media and shared a photo of him and Keough together lying in bed. It was posted with a caption, "So that happened."

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In the picture, the Australian stuntman appeared to be shirtless, his wolf tattoos very much visible. Without makeup on, the King of Rock and Roll's gorgeous grandchild can be seen sporting a huge sparkly engagement ring.

Online reports, including those of JustJared, told of how the couple had met on the set of "Mad Max." An insider told the site that Petersen had been cast as a stuntman alongside the actress on "Mad Max: Fury Road." Since then, they have been described as "inseparable."

Keough and Petersen went public with their love affair earlier this year when they were spotted putting on a PDA moment in Los Angeles.

Aside from the upcoming "Mad Max: Fury Road," Ben has also been featured as a stuntman in "The Hunger Games: Catching Fire."

"They're very serious. They're perfect for each other. Great people," an insider tells Us Weekly. Another source also said: "So happy for them. They joked about having a dog 'baby' together now and how it was just a matter of time until they made it official."

Keough, who had previously cozied up and got engaged to her "Magic Mike" co-star Alex Pettyfer, is the daughter of musician Danny Keough and ex-wife Lisa Marie Presley, daughter of the late musician icon Elvis Presley.

While Keough began her Hollywood career just this 2010 alongside Kristen Stewart in "The Runaways" and in Justin Timberlake's "TKO" music video in 2013, Presley's grandchild has been deemed as one of the industry's rising stars.

Despite both actresses being rumored to date "Twilight" star Robert Pattinson, Keough and Stewart have remained close friends. 

TagsRiley Keough, Ben Smith-Petersen, Elvis Presley, Lisa Marie Presley, Mad Max: Fury Road, The Hunger Games: Catching Fire, Kristen Stewart, Robert Pattinson, Alex Pettyfer