<P> The show's title sequence was promoted at Comic - Con 2014 six months prior to its scheduled broadcast premiere . As a result, the footage was uploaded by fans to YouTube who then started generating fan art and fan fiction . The first episode premiered on Disney Channel in January 2015 . The positive reaction on social media prompted Disney XD to order a second season of the series in February 2015, six weeks ahead of its launch of the series on Disney XD in March . Disney sitcom actors Olivia Holt and Kelli Berglund participated in promoting the series the weeks before its Disney XD premiere, with Holt dressing up as Star . </P> <P> The second season premiered on July 11, 2016, The show's third season was ordered ahead in March 2016 . It premiered on July 15, 2017 with a two - hour long television movie entitled "The Battle for Mewni" and consisted of the first four episodes . A live chat featuring Star and Marco was aired on Disney XD on July 17 . The remaining third - season episodes starting airing on November 6, 2017 . A fourth season was also ordered ahead of the third season premiere . </P> <P> Star vs. the Forces of Evil premiered in Canada on the DHX - owned Disney XD on April 6, 2015, and was later moved to the Corus - owned Disney XD on December 1 . The series premiered on Disney XD channels in the United Kingdom and Ireland on April 16, 2015, in Australia on August 3, and in the Middle East and Africa on October 5 . It also premiered on November 8 on Disney Channel in Southeast Asia . The series premiered on March 6, 2016, as Star Butterfly in French on Disney La Chaîne in Canada . The show premiered on November 2 on Disney XD in Italy, and on Disney Channel on November 2, 2016 . </P> <Table> <Tr> <Th_colspan="2"> Season </Th> <Th> Segments </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr> <Tr> <Th> First aired </Th> <Th> Last aired </Th> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td> 24 </Td> <Td_colspan="2"> 13 </Td> <Td_colspan="1"> January 18, 2015 </Td> <Td> September 21, 2015 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td> 41 </Td> <Td_colspan="2"> 22 </Td> <Td_colspan="1"> July 11, 2016 </Td> <Td> February 27, 2017 </Td> </Tr> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td> 38 </Td> <Td_colspan="2"> 21 </Td> <Td_colspan="1"> July 15, 2017 </Td> <Td> April 7, 2018 </Td> </Tr> </Table>

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