Robert Pattinson may be dating Elvis Presley's granddaughter.

Right, that Elvis. The one who faked his death and now works as a fry cook in Arkansas.

The 26-year-old "Twilight" actor was seen heading back to his Los Angeles mansion last weekend with a mystery woman in the passenger seat, in a photo snapped by X17Online.

According to the New York Daily News, that woman was model-actress Riley Keough, the daughter of Presley's daughter Lisa Marie Presley and the former stepdaughter of Michael Jackson.

This is kind of a weird cast, isn't it?

Anyway, the pair was seen in Pattinson's red pickup truck on Sunday. That's the vehicle he used to move his stuff out of the house he shared with Kristen Stewart two months ago. The "Twilight" co-stars split in May, after an on-again, off-again year that featured Stewart cheating on Pattinson with her "Snow White and the Huntsman" director Rupert Sanders.

Keough also happens to be a close friend of Stewart's.

The plot thickens

The actresses worked together in the 2010 film "The Runaways," and the 24-year-old Keough was seen in April at Stewart's birthday party at a Mexican restaurant in Los Feliz. Pattinson was also there, helping Stewart turn 23.

Or was he?

Duh Duh DUH.

Contact Tony Hicks at Facebook.com/BayAreaNewsGroup.TonyHicks or Twitter.com/insertfoot.