13 is the first episode of Andi Mack. It first officially premiered on the Disney Channel on April 7, 2017 combined with the second episode "Outside the Box".


Andi’s family life is thrown for a loop when her big sister, the freewheeling Bex, returns home with a secret on the eve of her 13th birthday. It begins with Bex arranging for Andi to train for Ultimate Frisbee with the cutest guy at school, Jonah Beck, who she learns has a high school age girlfriend, Amber.


Guest Cast


  • This episode combines with Outside the Box, to become the Andi Mack premiere movie "Tomorrow Starts Today."
  • This episode premiered on WATCH Disney Channel March 10, 2017.