Star

Star vs. the Forces of Evil: The Movie is a 2017 animated fantasy action/adventure comedy film produced by Walt Disney Pictures and DisneyToon Studios, directed by Daron Nefcy (the creator of the show itself) and co-directed by Joss Whedon. It's based on the 2015 animated TV series of the same name. It was released on June 21st, 2017.

Plot
Star, Marco and Pony Head set out on an epic adventure to save the world from Ludo and his villains.

Cast
Eden Sher as Star Butterfly

Adam MacArthur as Marco Diaz

Jenny Slate as Flying Princess Pony Head (aka Pony Head)

Alan Tudyk as Ludo and King Butterfly

Benedict Cumberbatch as Dark Moonlight, Star's frenemy from Mewni.

Emma Stone as Marina Smith, Marco and Jackie's roommate.

Joss Whedon as the Mighty Red Dragon, a dragon casted by Star's spell. (Whedon also co-directed the film)

Grey DeLisle as Jackie Lynn Thomas, Queen Butterfly, Janna and others

Matt Chapman as Alfonzo

Nate Torrence as Ferguson

Jon Heder as Oskar Greason

Minae Noji as Brittney Wong

Artt Butler as Rafael Diaz

Nia Vardalos as Angie Diaz

and more!

Trivia

 * Joss Whedon's directional debut in animation. He also directed The Avengers and Avengers: Age of Ultron.

Reception
The film received generally positive reviews from critics. Many fans said that Joss Whedon did a wonderful job co-directing the film and voicing as a new character in the film. They give it 8 out of 10 stars.

Music
The film features a song titled "Night Skies" performed by American singer Adam Young of Owl City.