Katy Perry, Riley Keough and Imogen Ker are all women Robert Pattinson has been linked to in recent months and they’re also reportedly (and not surprisingly) the cause of his recent feud with his ex-girlfriend, Kristen Stewart.

According to the latest OK! Magazine, Stewart, 24, is allegedly furious that Pattinson, 28, has begun dating fellow celebrities she considers to be her good friends. “Kristen thinks Rob is hooking up with them purposefully to punish her for the way their relationship ended and she's ticked,” reports the tabloid.

(For those handful of readers unfamiliar with Pattinson and Stewart’s split, their relationship reportedly came to a head last May following Stewart's highly publicized affair in 2012 with her then-married “Snow White and the Huntsman” director Rupert Sanders, now 43.)

While Pattinson never publicly confirmed a relationship with “Birthday” singer Katy Perry, 29, or models Riley Keough, 24, Imogen Ker, 22, Stewart is still reportedly fuming, apparently even leaving him an angry voicemail about his choice in dating partners.

“She flipped out on his voicemail,” a source told the magazine. “There are thousands of girls in L.A. Why does Rob need to hook up with her friends? He’s got to stop using her circle as a dating pool,” added the insider.

Pattinson was last rumored to be dating Ker after he was was photographed leaving The Little Door in Los Angeles with the fashion star on May 7. According to reports, the twosome, who were first introduced by Stewart’s longtime pal and Pattinson’s former “Twilight” co-star, actress Dakota Fanning, was spotted enjoying each other’s company over dinner and drinks before exiting the hotspot together in the early morning hours.

In July, an image surfaced of Pattinson driving around Los Angeles with model and aspiring actress, Riley Keough. Despite Keough denying her relations with the British film star, multiple outlets reported that the duo later became an item after being introduced by Stewart on the set of the 2010 biographical flick “The Runaways.” According to an insider close to Stewart, the actress reportedly “flew off the handle” upon learning of her ex's romp with her pal. “She’s told Rob via friends she feels violated,” a source told Celebitchy.com.

Pattinson was immediately linked to Perry of “I Kissed a Girl” fame following his split from Stewart last May, one report even claiming the singer “played a role” in the film stars' breakup. While the duo consistently deny they’re an item (“I fart in front of him,” Perry told Elle U.K. of her relationship with the actor in August.) the pals were rumored to have shared a passionate kiss while attending the H&M Love Music party at the Coachella Valley and Music Festival on April 12.

On Sunday, Pattinson made a rare appearance at the 67th Cannes Film Festival in France to premiere his upcoming films “Maps to the Stars” and David Michod’s “The Rover.” During the promotions, the actor revealed his desire to live a more private life post-“Twilight” fame. “I’m just trying to not be in stupid gossip magazines,” Pattinson told the NY Post’s Page Six. “I think the best way to do it is never be photographed ever.”

Good luck with that, Rob.