Diane Jean McBain was an American actress who, as a Warner Brothers contract player, reached a brief peak of popularity during the early 1960s. She was best known for playing an adventurous socialite in the 1960–1962 television series Surfside 6 and as one of Elvis Presley's leading ladies in 1966's Spinout.

Surfside 6 is an ABC television series that aired from 1960 to 1962. The show centers on a Miami Beach detective agency set on a houseboat, and features Troy Donahue as Sandy Winfield II, Van Williams as Kenny Madison, and Lee Patterson as Dave Thorne. Diane McBain co-stars as socialite Daphne Dutton, whose yacht is berthed next to their houseboat. Spanish actress Margarita Sierra also plays a supporting role as Cha Cha O'Brien, an entertainer who works at the Boom Boom Room, a popular Miami Beach hangout at the Fontainebleau Hotel, directly across the street from Surfside 6.