After photos surfaced of Robert Pattinson riding around in his pickup truck with a Kristen Stewart look-alike on Saturday, the mystery woman was found to be actress/model Riley Keough.

Keough, 23, is the granddaughter of Elvis Presley, the deceased rock and roll icon. Her mother is Lisa Marie Presley, Elvis' famous daughter who was once married to Michael Jackson, and her father is musician Danny Keough. Riley starred alongside Stewart and Dakota Fanning in the Joan Jett biopic, 2010's The Runaways and in last year's Magic Mike, alongside Channing Tatum.

X17 Online published exclusive photos on Monday of Keough sitting in the passenger seat of Pattinson's Chevy Silverado as he drove around Stewart's Los Feliz neighborhood on June 29. The British actor had a brand new table tennis board in the back of his truck and they were seen taking it to his home, which is also in Los Feliz.

Mail Online published a photo on Tuesday of Stewart sitting next to Riley with her arm wrapped around her co-star. Fanning and real-life The Runaways singer Joan Jett also appear in the picture, which was taken in 2010.

The British website also published a picture of Keough standing next to Pattinson outside the birthday party he threw for Stewart in April. They were outside of the Mexican restaurant Cantina Malo in Los Feliz, one of Stewart's favorite haunts.

See the photos of Keough with Stewart and Pattinson here. 

Enstars reported on April 11 that Pattinson threw a 23rd birthday party for Stewart at the Mexican restaurant. At the time a party guest told Hollywood Life that Pattinson and Stewart looked "so in love" but at times "they weren't glued to each other's side."

Riley previously dated Alex Pettyfer, who she met on the set of Magic Mike. The couple began dating in 2011 and were later engaged, however, they ended their relationship earlier this year, according to Hollywood Life. She has also been romantically linked to Jonah Hill, Ryan Cabera and Jennifer Lawrence's ex Nicolas Hoult, according to the report.

Watch the trailer for The Runaways starring Kristen Stewart and Riley Keough below.

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