Henny Backus (born Henrietta Kaye, March 21, 1911 – December 9, 2004) was a Broadway showgirl in the 1930s whose stage credits include Orson Welles's Horse Eats Hat.

[1] Working as Henriette Kaye, she was a member of the Federal Theatre Project.

Described by The New York Times as "a leggy redhead with a droll sense of humor",[2] she appeared in Orson Welles's Project 891 production Horse Eats Hat (1936), a surrealistic farce co-starring Welles, Joseph Cotten, Hiram Sherman and Arlene Francis.

Henny and Jim Backus co-authored several humorous books, including What Are You Doing After the Orgy?

Henny also wrote Care for the Caretaker (1999), documenting her husband's battle with Parkinson's disease and offering practical solutions for those facing such dilemmas.