Walter Stacy Keach Jr., born on June 2, 1941, is a towering figure in American entertainment, renowned for his commanding presence across stage, film, and television for over six decades. He first distinguished himself in Off-Broadway productions and is widely celebrated as a preeminent Shakespearean actor, earning numerous theatrical accolades including four Drama Desk Awards and two Helen Hayes Awards. His early promise was underscored by a Tony Award nomination for Best Actor in a Play for his performance in Arthur Kopit's 1969 production of "Indians," as well as two Obie Award nominations for Distinguished Performance by an Actor. Keach's film career took off with critical acclaim for his portrayal of a washed-up boxer in John Huston's Fat City (1972), and he became a familiar face to audiences as Sergeant Stedenko in the cult comedies Up in Smoke (1978) and Nice Dreams (1981). His other notable film credits include Brewster McCloud (1970), Doc (1971), The Life and Times of Judge Roy Bean (1972), The New Centurions (1972), Luther (1974), Slave of the Cannibal God (1978), The Ninth Configuration (1980), The Long Riders (1980), Roadgames (1981), Batman: Mask of the Phantasm (1993), Escape from L.A. (1996), American History X (1998), The Bourne Legacy (2012), and Nebraska (2013).

On television, Keach achieved iconic status for his portrayal of private detective Mike Hammer in a series of television movies and the series Mickey Spillane's Mike Hammer (1984–1987), a role that earned him a Golden Globe nomination. He later showcased his comedic talents as the abrasive father Ken Titus on the sitcom Titus (2000–2002) and lent his distinctive, authoritative voice as the narrator of the long-running crime documentary series American Greed (2007–present). His television work also included a main cast role on the sitcom Man with a Plan (2017–2020) and recurring roles on Prison Break (2005–2007), Two and a Half Men (2010), Blue Bloods (2016–2024), and The Blacklist (2019–2023). Keach won a Golden Globe and received a Primetime Emmy Award nomination for his powerful portrayal of Ernest Hemingway in the television miniseries Hemingway (1988). His enduring contributions have been recognized with induction into the Theatre Hall of Fame and a star on the Hollywood Walk of Fame in 2019. The son of theatre director Stacy Keach Sr. and the older brother of actor James Keach, Keach remains a vital presence in the industry, continuing to narrate American Greed and take on occasional film and television roles, solidifying his legacy as a versatile and enduring performer.