Barbara Walters by Donna Svennevik/ABC Barbara Walters by Donna Svennevik/ABC

In her upcoming memoir, Audition, Barbara Walters reveals for the first time an affair she had with Sen. Edward Brooke in the 1970s.

She discussed her memoir on Oprah, during a taping scheduled to air on May 6.

In a transcript provided to the Associated Press, Walters says the affair with Brooke, the first African-American to be popularly elected to the U.S. Senate, ended before he lost a re-election bid in 1978.

At the time, Walters was twice-divorced. Brooke was married, and has since divorced and re-married.

When asked if she was in love, Walters replied, "I was certainly - I don't know - I was certainly infatuated. Infatuated. I was certainly involved. He was brilliant. He was exciting. It was exciting times in Washington." - J.R. Whalen