The Training Day actor, 58, signed on to portray disenchanted limousine driver Walter Lee Younger in a new version of Lorraine Hansberry's play - and now he has revealed Carroll will be joining him onstage.
During an interview on U.S. morning show Live with Kelly & Michael on Tuesday (30Jul13), the Tony Award-winner said, "Diahann Carroll is playing my mother. So this will be her first time back in 30 years... I'm excited."
Previews for the revival of A Raisin in the Sun are due to begin next March (14).
Dynasty star Carroll, 78, last appeared on Broadway in a production of Agnes of God in 1983.
Sidney Poitier originated the role of Younger in the original 1959 Broadway production of A Raisin in the Sun, and rap mogul Sean 'Diddy' Combs showed off his acting skills in the role in 2004. Both versions were turned into movies.