Lisa Marie Presley debunked the rumor that her daughter, Riley Keough, dated Robert Pattinson.

When Presley appeared on Watch What Happens Live on Thursday, a caller asked her to address Keough's dating life.

Sitting alongside fellow guest CeeLo Green, Presley told host Andy Cohen: "I will say who she's not with... and that is a complete lie, and the silliest thing I've ever heard, is that she was with Robert Pattinson, because she and Kristen Stewart are like best friends. So that was the craziest rumor that I will put to bed... That was NOT true."

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Rumors of the alleged romance stirred after photos surfaced of Stewart's ex-boyfriend driving around in his pickup truck with a redhead, presumed to be Keough, in the passenger seat. 

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A rep for the 24-year-old actress denied the claim a week later and told JustJared.com that "Riley isn't dating Rob."

 "And I can confirm that Riley was not photographed at all this weekend," her rep added, confirming Keough was not the mystery woman in Pattinson's car.

Keough is the granddaughter of Elvis Presley, the deceased rock and roll icon, and the daughter of musician Danny Keough. She starred alongside Stewart and Dakota Fanning in the 2010 Joan Jett biopic, The Runaways, as well as 2012's Magic Mike with Channing Tatum.

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Watch Lisa Marie Presly debunk the Robert Pattinson-Riley Keough dating rumor below:

Tags: Riley Keough Robert Pattinson