- Dot Comet: Dot has a bubbly personality and is always full of energy. She is played by Dakota Fanning. - Hal: Hal is Dot's best friend and is always up for an adventure. He is played by Zachary Levi. - Ruby Marshall: Ruby is the sweet and caring friend of Dot and Hal. She is played by Jenna Coleman. - Nev and Dev Jumelle: The mischievous twin brothers who are always causing trouble for Dot and her friends. They are played by Cole and Dylan Sprouse. - Mr. Comet: Dot's father who is always busy but loves spending time with his daughter. He is played by Hugh Jackman. - Mrs. Comet: Dot's mother who is kind and nurturing, always looking out for her family. She is played by Amy Adams.