From Wikipedia, the free encyclopedia. Cozi Zuehlsdorff (born c. 1998) is an American actress, pianist, and singer. She started her acting career by acting in plays, then she began to try out for movies. Her most recent play is You're a Good Man, Charlie Brown. She is also known for her appearance in the movie Dolphin Tale(2011) and the sequel, Dolphin Tale 2 (2014). She also starred in Mighty Med... see more