Once Upon a Mattress (2005)

In this hilarious tweaking of the fairy tale, "The Princess and the Pea", 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). The queen is horrified and immediately begins to scheme, but Winnifred, with some help from Sir Harry, the King, and the Jester, isn't going to be quite so easy to get rid of.