Norman Jay "Dack" Rambo (November 13, 1941 – March 21, 1994) was an American actor, most notable for appearing as Walter Brennan's grandson Jeff in the ABC series The Guns of Will Sonnett, as Steve Jacobi in All My Children, as cousin Jack Ewing on CBS's Dallas, and as Grant Harrison on the NBC soap opera Another World.
Born in Earlimart, California, Rambo had a twin brother, Orman Ray "Dirk" Rambo, who died in a road accident in 1967.
After moving to Los Angeles in the 1960s, both Dirk and Dack were discovered by actress Loretta Young and cast in her short-lived CBS series The New Loretta Young Show. In 1967, Rambo landed the role of Jeff Sonnett on The Guns of Will Sonnett, and co-starred in the short-lived Gunsmoke spin-off Dirty Sally, with Jeanette Nolan. He later made guest appearances on Marcus Welby, M.D., House Calls, All My Children, Fantasy Island, The Love Boat, Hotel, and Murder, She Wrote.