Marianna Hill, sometimes credited as Mariana Hill, is an American actress mostly working in American television.
A life member of The Actors Studio, Hill has appeared in more than 70 films and television episodes. She played Gabrielle in the Howard Hawks film, Red Line 7000 and co-starred in the Elvis Presley film Paradise, Hawaiian Style in 1966 as Lani Kaimana; the Clint Eastwood film High Plains Drifter as Callie Travers in 1973; and in The Godfather II in 1974 as Deanna Dunn-Corleone.
Hill guest-starred in several 1960s sitcoms, a short list of which include My Three Sons, Hogan's Heroes, Love American Style, and Batman.
One of Hill's many TV appearances was as Dr. Helen Noel in the Star Trek: The Original Series episode, "Dagger of the Mind". She also appeared on Perry Mason in the title role as Theba in the 1963 episode, "The Case of the Greek Goddess."
She also guest-starred in the following drama series: Death Valley Days, Bonanza, The High Chaparral, Gunsmoke, The Wild Wild West, The F.B.I., Mission: Impossible, Quincy, M.E., S.W.A.T., Kung Fu, The Outer Limits, and Harry O.