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LAS VEGAS -- South Parkco-creator Trey Parker has voiced characters Eric Cartman and Stan Marsh since the dawn of South Park in 1997, but here's something you won't believe: No one has ever asked him to voice anything else. 

Until now.

Parker has been tapped by Universal Pictures animation arm Illumination to be the voice of Balthazar Bratt, the villain in next summer's Despicable Me 3.

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Bratt is a former '80s child star -- complete with flat-top mullet and bad moustache -- whose show was cancelled, cutting his stardom short before he could hit puberty (Universal showed him onscreen at Caesar's Palace but hasn't released any art). 

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All of this according to Illumination head Chris Meledandri, who announced the voice casting Wednesday at CinemaCon, the annual meeting of Hollywood studios and the exhibitors who show their movies.

Stan Marsh and Eric Cartman.Credit: Comedy central

In other Despicable Me 3news, Steve Carell's character, Gru, will be facing an all-new threat in Me 3: his long-lost twin brother, a full-head-of-blonde-haired, otherwise identical twin to be voiced by ... well look at this, Steve Carell.

Meledandri said Parker was thrilled to finally do some voice work that began and ended there -- standing up after a day's work in the sound booth and declaring "I'm just glad that someone else will have to figure out the second act!"

Despicable Me 3is due in theaters June 30, 2017.

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