<Li> Kristin Chenoweth as Princess Skystar, an excitable seapony and magically transformed hippogriff princess . Chenoweth said of her character, "Let's just say she's been locked up for a while and is longing for friends ." She joked that she dabbled in method acting for the role, making sure her hair was "on point for every recording session". </Li> <Li> Uzo Aduba as Queen Novo, the benevolent ruler of the hippogriffs - turned - seaponies, and Princess Skystar's mother . The character is described by Chenoweth as "loving but also a little too strict and stern". Detailing her role, Aduba says, "She (wants) to protect her group to the best of her ability, and (wants) to create a life of peace and stability . She doesn't take any nonsense, and will do everything in her power to protect her family ." </Li> <Li> Sia as Songbird Serenade, a pegasus and famous pop star in Equestria . The character's design is modeled after Sia's likeness . </Li> <P> Nicole Oliver, St. Germain, and Britt McKillip reprise their respective roles from Friendship Is Magic as alicorns Princess Celestia, Princess Luna, and Princess Cadance . St. Germain also voices Granny Smith, Applejack's grandmother, and Muffins, a cross-eyed pegasus alternatively known as "Derpy" in the series . Michelle Creber and Peter New voice Apple Bloom and Big McIntosh, Applejack's younger sister and older brother, respectively . Michael Dobson voices Bulk Biceps, a muscular pegasus . Samuel Vincent voices Party Favor, a balloonist unicorn . </P>

Who plays the singer in the my little pony movie