Dori Berinstein's long-awaited documentary, Marvin Hamlisch: What He Did for Love, airs tomorrow night at 9pm, the finale of PBS' 27th season of American Masters. Featuring interviews with friends, family, and fellow theatrical colleagues, the film traces the life of one of Broadway's most accomplished musicians. For a peek at tomorrow evening's premiere, check out the preview below to glimpse the Tony-winning composer's early days as a prodigious pianist.

To read more about the documentary, click here.