Born in Santa Cruz, California, Radetsky began studying ballet in the San Francisco Bay Area. At 15, he left to train at Moscow’s Bolshoi Academy and at the Kirov Academy in Washington, D.C. Radetsky joined American Ballet Theatre’s corps de ballet in 1996, was promoted soloist in 2003, and retired in 2014. He has been a principal or guest principal with the Dutch National Ballet, Pacific Northwest Ballet, the Berlin Staatsballett, Ballet San Jose, Ballet do Theatro Municipal of Rio de Janeiro, and the Mongolian State Academic Theatre of Ballet. He has choreographed for Bucknell University’s Department of Theatre and Dance, and written for Vogue.com, Dance Magazine, Dance Spirit, Shinshokan Dance Magazine, and Newsweek. He is a repetiteur-in-training with the Antony Tudor Ballet Trust. He starred in the Columbia Pictures film, Center Stage, and will appear as a principal actor in the Starz television series, Flesh and Bone, airing in late 2015. He is also visiting guest teacher and judge for Youth America Grand Prix, and has been named as director of the ABT/NYU Master’s Degree Program in Ballet Pedagogy.