<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 . The fourth season is scheduled to premiere in early 2019 . </P>
when does the next episode of star vs the forces of evil air
in early 2019