Born in Anchorage, Alaska and raised in Southern California, Dion Mucciacito had to overcome many obstacles before finding his way to acting. His mother, Angela Mucciacito, lost her battle with brain cancer and died at the age of 34 when Dion was only 8. His father, David, a member of the Anchorage Fire Department, was overcome with grief after Angela's death and fell deep into alcoholism. He would ultimately die in a drunk driving accident at the age of 48. Through all of this, Dion's extended family came together to help raise him and his older brother Dominic. With the support of his family he was able to develop his interest in acting while in high school. Although he was an athlete who loved boxing and martial arts, he found the emotional engagement in acting therapeutic and rewarding in ways that sports weren't. Dion eventually attended the University of California at Santa Barbara where he studied Film. As an undergraduate he took an interest in post colonial theory and found a love for political activism. This married with his interest in theater and lead him to serve as a human rights observer for Zapatista rebel communities in Chiapas Mexico. He eventually would travel to Port Elizabeth, South Africa to teach self empowerment through the arts to township youth directly effected by the AIDS epidemic. After graduating UCSB, Dion continued his development as a performing artist at the Juilliard School. Since graduating, he has performed in many regional theaters, as well as off Broadway theaters. He made his Broadway debut in Clifford Odets' Golden Boy, playing Sam, and a boxer, in 2012.