Cal Culver, who performed under the name Casey Donovan, died of an Aids-related illness in 1987, and Reeve died in 2004, but the interview was conducted before Culver's death and is just being revealed now.
Culver says Reeve was the 'man of his dreams' and says their relationship lasted about two months.
Photo of Cal Culver.
While Reeve is perhaps best known for his role as the macho superhero Superman, he also took on a role in 1982 film Deathtrap, which saw him share a kiss with co-star Michael Caine.
We will never know if the affair was real since both actors are dead.