Joel Grey (born Joel David Katz; April 11, 1932) is an American actor, singer, dancer, photographer, and theatre director. He is best known for portraying the Master of Ceremonies in the musical Cabaret on Broadway and in Bob Fosse's 1972 film adaptation. He has won an Academy Award, a BAFTA Award, a Golden Globe Award, and a Tony Award. He earned the Lifetime Achievement Tony Award in 2023.

Grey's Tony-nominated roles include for the musical George M! (1968), Goodtime Charley (1975), and The Grand Tour (1979). After portraying Amos Hart in the Broadway revival of Chicago (1996), he originated the role of the Wizard of Oz in the musical Wicked (2003) and played Moonface Martin in the 2011 revival of Anything Goes. He directed the 2011 revival of Larry Kramer's The Normal Heart earning a Tony Award nomination for Best Direction of a Play.

He earned a Golden Globe Award for Best Supporting Actor – Motion Picture nomination for his role in Remo Williams: The Adventure Begins (1985). His other film roles include in Buffalo Bill and the Indians, or Sitting Bull's History Lesson (1976), Kafka (1991), The Music of Chance (1993), The Fantasticks (2000), and Dancer in the Dark (2000). He earned an Emmy nomination for Outstanding Guest Actor in a Comedy Series for Brooklyn Bridge (1993). He also acted in Oz (2003), Alias (2005), House (2006), Nurse Jackie (2011), and The Old Man (2022).