Emma Roberts and Ariana Grande have yet to film a scene together for their upcoming comedy-horror "Scream Queens" television series but there are rumors that the two stars are already feuding.

Scream Queens is just about to start production, but two of the main characters, 24-year old Emma and 21-year old Ariana are reportedly already butting heads. While, the rumor sounds like a good plotline for the new series, unfortunately, it is not as the "American Horror Story" actress Emma is upset and annoyed with Ariana.

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So what is it about Ariana that's making Emma so annoyed at her? Well, it's because of the "Break Free" singer's demands which involves cellphones.

A source revealed that Emma got wind of Ariana's request that she does not want anyone tinkering with or simply holding their cellphones while on set. Emma went crazy during a rehearsal and repeatedly told the producer how upset she was about it. Evan Peters, Emma's fiancé was there to calm her down but Emma lost her cool and walked out the set.

It's fortunate that Ariana wasn't present at the rehearsal when Emma, who's actually the Queen Bee in Scream Queens, went on a tirade. Hopefully, things between the two celebrities will cool down just in time for the series' production's start date.

Scream Queens is an upcoming Fox series which features Emma Roberts, Ariana Grande, Jamie Lee Curtis, Lea Michele, Keke Palmer, Oliver Hudson and Abigail Breslin.

TagsEmma Roberts, Ariana Grande, Scream Queens