Cozi began her acting career at the age of eight when she was encouraged to audition for Annie at a local theater company in Aliso Viejo, Ca. At the time, Cozi thought it would be more fun to go see the musical than to be in it, but in the end decided to audition. She was cast as Annie and has been hooked on musical theater ever since. She has played Dorothy in The Wizard of Oz, JoJo in Seussical the Musical, Sally Brown in You’re a Good Man Charlie Brown, and Brigitta in The Sound of Music, to name a few. Cozi landed her first principal role as Hazel in the movie Dolphin Tale, produced by Alcon Entertainment and distributed by Warner Bros. Pictures. The film stars Morgan Freeman, Harry Connick Jr., Ashley Judd, Kris Kristofferson, and Nathan Gamble and was released on September 23, 2011, reaching number 1 at the box office in its second week. 3 years later, she reprised her role in Dolphin Tale 2.