Walter Stacy Keach Jr. is an American actor, active in theatre, film and television since the 1960s. Keach first distinguished himself in Off-Broadway productions and remained a prominent figure in American theatre across his career, particularly as a noted Shakespearean. He is the recipient of several theatrical accolades, four Drama Desk Awards, two Helen Hayes Awards and two Obie Awards for Distinguished Performance by an Actor. He was nominated for a Tony Award for Best Actor in a Play for his performance in Arthur Kopit's 1969 production of Indians.

The Tony Award for Best Performance by a Leading Actor in a Play is an honor presented at the Tony Awards, a ceremony established in 1947 as the Antoinette Perry Awards for Excellence in Theatre, to actors for quality leading roles in a Broadway play. The awards are named after Antoinette Perry, an American actress who died in 1946. Honors in several categories are presented at the ceremony annually by the Tony Award Productions, a joint venture of The Broadway League and the American Theatre Wing, to "honor the best performances and stage productions of the previous year." Despite the award first being presented in 1947, there were no nominees announced until 1956.