<P> Star vs. the Forces of Evil is an American animated fantasy comedy - adventure television series created by Daron Nefcy and produced by Disney Television Animation . The series centers on Star Butterfly, a magical princess from the dimension of Mewni who is sent to Earth by her parents the Queen and King Butterfly, when they decide she should learn to wield magic away from their kingdom . As an exchange student on Earth, she boards the house of Marco Diaz whom she befriends as they both attend high school . The series marks the second woman - led animated series by Disney . Before the series was picked up, Nefcy had worked as an artist for Disney's Wander Over Yonder and Nickelodeon's Robot and Monster . </P> <P> The first episode of the series premiered on January 18, 2015, on Disney Channel . Succeeding episodes have premiered on Disney XD starting March 30, 2015 . The series had been renewed for a second season a month before its Disney XD premiere . In March 2016 it was renewed for a third season prior to its second - season premiere scheduled for July that year . The episode "Bon Bon the Birthday Clown" marked the mid-season finale for the second season, according to Nefcy . The second half of the season aired entirely in February 2017 on weekdays, with either a half - episode segment or a full episode premiering each day . In the same month, the series was renewed for a fourth season . </P> <P> A two - hour television film called The Battle for Mewni, which comprises the first four episodes of the third season, premiered on July 15, 2017, with the succeeding third - season episodes to begin airing in November 2017 . </P>

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