Diane McBain (born May 181941) is an American actress who, as a Warner Brothers contract player, reached a brief peak of popularity during the early 1960s. She is best known for playing an adventurous socialite in the 1960-62 TV series Surfside 6 and as one of Elvis Presley's leading ladies in 1966's Spinout.

Signed on as a Warner Brothers starlet, bouncy, blonde-coiffed Diane McBain would develop a burgeoning career as a lively 60s bad girl for film and TV. Born on May 18, 1941 in Cleveland, Ohio, she started things off as a "sweet 16" model in print and commercial ads. Eventually, television got more than just a glimpse of this diverting beauty after a WB talent agent spotted her in a Los Angeles play. Diane made her first big splash in 1960 as the dizzy good time girl and socialite "Daphne Dutton" on the TV series "Surfside 6" (1960) alongside Van Williams (later TV's "Green Hornet") and beef-cake film star Troy Donahue. Brimming with style and confidence, Diane was quickly ushered into films as Warner's answer to Carroll Baker, winning parts in two consecutively trashy soaps. The first was Parrish (1961) with (again) Donahue and screen legend Claudette Colbert; the other was the title role in Claudelle Inglish (1961) opposite up-and-comers Chad Everett and Robert Logan (I). Unfortunately, neither the scripts nor the box office was anything to write home about and her film career started to flounder with such fodder as Caretakers, The (1963) with Joan Crawford (I), Distant Trumpet, A (1964), yet again with Donahue, and Spinout (1966), which was more like an Elvis Presley fizz-out. Still and all, Diane proved popular with her devilish débutantes and snobby sophisticates, even accompanying Bob Hope (I) on one of his USO tours of South Vietnam in 1966/67. On the cult series "Batman" (1966), she played "Pinky Pinkston" (with pink hair, pink outfits and a pink dog). By the late 1960s, her career had drifted into tawdry exploitation with terrible titles: I Sailed to Tahiti with an All Girl Crew (1968), Maryjane (1968) and Mini-Skirt Mob, The (1968) (miscast as a biker chick) being the worst of the lot. So, Diane focused on family and more or less split the scene. A few plays and low budget films came her way and, in the 80s, she was seen a bit more on daytime soaps. Hard to believe, but nowadays, the still young-looking and ever-elegant Diane is still out and about, even plays good-looking grandmas on such shows as "Sabrina, the Teenage Witch" (1996).