Gretha Boston (born April 18, 1959, in Crossett, Arkansas) is an American actress. Boston made her Broadway debut as "Queenie" in the 1994 revival of Show Boat, directed by Hal Prince. She won the Tony Award for Best Featured Actress in a Musical for her performance and was also nominated in the same category in 1999 for her performance in the original musical revue It Ain't Nothin' But the Blues.