Began singing professionally at the age of 12.
Best remembered by the public for his role as "Corporal Louis LeBeau" in the television series "Hogan's Heroes" (1965).
Clary and Larry Hovis (Andrew Carter on "Hogan's Heroes" (1965), former singer) would sing together between shots.
Clary, having been in a concentration camp, has a tattoo on his arm, which, if you notice, is the reason why in "Hogan's Heroes" (1965) he is the only one who never wears short sleeves/goes sleeveless.
During most of the filming of the first season of "Hogan's Heroes" (1965), Robert became frustrated with the smallness of the part he was playing. At one point, he wanted to leave the show altogether, but something a director said to him made change his mind.
Has a tattoo on his left forearm, "A5714," from his time in a German concentration camp during WWII.
He moved to the US in 1949 and found work in nightclubs, then made a name for himself in the Broadway show "New Faces of 1952."
Son-in-law of Eddie Cantor and Ida Tobias Cantor.
Was good friends with Werner Klemperer (Colonel Klink from "Hogan's Heroes" (1965)), even after the show had been canceled, and until Werner's death.
Was the youngest of 14 children; most of whom died in the Nazi concentration camps.