Queen Aggravain has ruled that none may marry until her son, Prince Dauntless marries. However, she has managed to sabotage every princess that come along. When Sir Harry and Lady Larken learn that they are going to be parents, wed or not, he goes off to the swamps and brings back Princess Winnifred ("Fred" to her friends).
Unfortunately the movie Once Upon A Mattress is not yet available on HBO Max.
| Directing | Kathleen Marshall | Director |
| Writing | Janet Brownell | Writer |
| Editing | Scott Vickrey | Editor |
| Production | Coreen Mayrs | Casting |
| Writing | Mary Rodgers | Musical |
| Production | Stephanie Gorin | Casting |
| Writing | Dean Fuller | Musical |
| Writing | Jay Thompson | Musical |
| Camera | Robert McLachlan | Director of Photography |
| Writing | Marshall Barer | Musical |
| Costume & Make-Up | Christopher Hargadon | Costume Design |
| Production | Marc Platt | Executive Producer |
| Sound | Mary Rodgers | Songs |
| Sound | Mary Rodgers | Music |
| Writing | Marshall Barer | Lyricist |
