Evan Peters and Emma Roberts relationship Evan Peters and Emma Roberts are rumored to be causing chaos on the set of "American Horror Story: Freak Show" with their wild behavior. Photo: FX

It looks like Twisty the Clown (John Carroll Lynch) isn’t the only “American Horror Story” character wreaking havoc on the set of “Freak Show.” According to a report by OK! magazine, FX actors Emma Roberts, 23, and her fiancé, Evan Peters, 27, have also been stirring up drama after the director yells, “Cut.”

A source told OK! magazine that the couple, who got engaged in 2012, are constantly causing chaos with their erratic behavior on the set of the series. As soon as a scene concludes, “Emma and Evan are making out – that is, if they’re not screaming at each other,” the insider dished.

Even their co-stars think they’re a bit wacky. Angela Bassett, who plays Desiree Dupree, admitted during an interview that Roberts is a wild child.

“Emma is pretty crazy, especially last night, it was she and I till midnight outdoors in the cold,” she admitted to reporters, adding that as rambunctious as Roberts is, she still knows how to make her laugh when “Freak Show” scenes get too intense. “She’s pretty funny," Bassett said.

The Tinseltown twosome is no stranger to having their rowdy relationship highlighted in the media. In 2013, Roberts, daughter of actor Eric Roberts and niece of Julia Roberts, was arrested for a domestic violence incident in Canada. TMZ reported that the starlet was taken into custody after allegedly beating Peters to a pulp. Peters, however, refused to press charges. Apparently no amount of bloody noses, bite marks or on-set fights could tear these two apart – especially when there are steamy makeout sessions involved.

The source told OK! magazine that after the duo partakes in a heated argument, they always make up with a kiss.

Roberts and Peters also play a tormented couple on TV. In Season 4 of “American Horror Story," Roberts plays Maggie Esmerelda, a con artist who pretends to be a fortune teller in hopes of luring a freak show performer to their death. Peters, her real-life fiancé, is Jimmy Darling, an ectrodactyly who stars in one of Elsa Mars’ (Jessica Lange) acts. Now that's what you call a carnival of a relationship!

Tune in to "American Horror Story: Freak Show" Wednesday, Dec. 10, at 10 p.m. EST on FX to catch episode 10, "Tupperware Party Massacre."