Robert Westenberg (born October 26, 1953) is an American musical theatre actor, acting teacher and professor. He appeared on Broadway in Sunday in the Park with George The Secret Garden and Into the Woods, as well as several other musicals. He is the musical theatre coordinator and associate professor in the theatre and dance department at Missouri State University.
Born in Miami Beach, Florida, but raised in Fresno, California with his six siblings. Westenberg graduated Bullard High School in 1971, where he was active in sports, specifically football. He then attended California State University, Fresno.
Westenberg received a master's degree from the Denver’s National Theatre Conservatory.
He made his Broadway debut in the 1983 revival of Zorba as Nikos, for which he won the Theatre World Award. He took over the role of George in Stephen Sondheim's Sunday in the Park with George in September 1984, and played opposite Bernadette Peters. He received a Tony Award nomination and won a Drama Desk Award for his performance as Cinderella's Prince and the Wolf in Sondheim's Into the Woods (1987). It was during this show where he met his wife, Kim Crosby, who played Cinderella. He starred with Mandy Patinkin, Daisy Eagan, Alison Fraser and Rebecca Luker in the original Broadway production of The Secret Garden in 1991.