Anthony Rapp had a special feeling about Jonathan Larson's rock musical Rent as early as his first audition, which won him a starring role as the video artist Mark Cohen. The Pulitzer Prize-winning Rent opened to thunderous acclaim off-Broadway--but even as friends and family were celebrating the show's first success, they were also mourning Jonathan Larson's sudden death from an aortic aneurysm. And when Anthony's mom began to lose her battle with cancer, Anthony found himself struggling to balance his life in the theater with his responsibility to his family.

Anthony Rapp...