Robert Pattinsons's mystery girl may have been revealed to be Riley Keough.

The Twilight actor and former Kristen Stewart love interest was spotted by X17 as he drove around Los Angles on June 29. With him in his pickup truck was an unidentified red-headed woman. You can get a look at the pic here.

X17 now claims that the female riding shotgun was actually Elvis Presley's eldest grandchild, the 24-year-old Keough.

Daughter of Lisa Marie Presley and Danny Keough, the music legend's granddaughter began acting at the age of 19, according to ABC. The first film she starred in was the rock-based indie flick The Runaways.

Ironically, the 2010 film also featured Pattinson's on-and-off girlfriend, Stewart. Keough appears to be close enough to her former costar to warrant an invitation to Stewart's 23 rd birthday bash at Mexican restaurant in the Los Angeles neighborhood of Los Feliz, reports the New York Daily News.

Pattinson allegedly moved out of Stewart's place in late May and this weekend Stewart was seen attending Fashion Week in Paris, according to the New York Daily News. The couple hit a rough spot when Stewart was caught getting a little to close to last year's Snow White and the Huntsman director Rupert Sanders.

While Pattinson may just have been spending a friendly day together with Keough, a possible romantic relationship could finally put the nail in the coffin of the Pattinson-Stewart love story.

Watch Riley Keough Shocking Transformation in Jack and Diane:

Tags: Kristen Stewart Robert Pattinson Riley Keough