<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 . The show will be moving from Disney XD to Disney Channel for its 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 . The season concluded on April 7, 2018, with a two - part one hour finale . </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> <Tr> <Td> </Td> <Td_colspan="1"> </Td> <Td> TBA </Td> <Td_colspan="2"> 21 </Td> <Td_colspan="1"> TBA </Td> <Td> TBA </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Season </Th> <Th> Segments </Th> <Th_colspan="2"> Episodes </Th> <Th_colspan="2"> Originally aired </Th> </Tr>

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