Allyn S. King (February 1, 1899 – March 31, 1930) was an American stage and film actress and singer who began her career in vaudeville, and later as a Ziegfeld Follies performer.

Allen King was from Louisiana and, after receiving his degree in the early 1900s, returned to his home state to set up a medical practice in Morgan City.

[8] King appeared in at least one silent film, The Fighting Blade (1923), in which she played Charlotte Musgrove, the sister of Thomsine, whose lover, Dutchman Karl Van Kerstenbrook, had come to England to serve in Oliver Cromwell's army.

It is expressly made a part of this agreement and is an essential part, therefore, that if at any time you should during the term of the said arrangement, increase in weight more than sixteen pounds or decrease in weight more than ten pounds or let the dimensions of any part of your figure vary more than one-half inch from the following, weight 115 pounds, neck 12 ½ inches, bust 34 inches, upper arm 11, lower arm 7 ½, waist 26, hips 34, thigh 18, calf 12, ankle 8 ½, then and in that event we shall have the right to cancel this contract upon giving you one week's notice.

In 1924, King was reported to be engaged to Carl Wiedemann, a wealthy brewer from Newport, Kentucky and owner of the racehorse In Memoriam.

The year before, German actress Marietta Millner's death was also attributed to excessive dieting to meet her contractual obligations.