Princess and dragon is a generic premise common to many legends, fairy tales, and chivalric romances. It is not a fairy tale itself, but along with Prince Charming, is a repeated cliché. Northrop Frye identified it as a central form of the quest romance.
The story involves an upper class woman, generally a princess or similar high-ranking nobility, saved from a dragon, either a literal dragon or a similar danger, by the virtuous hero (see Damsel in distress). She may be the first woman endangered by the peril, or may be the end of a long succession of women who were not of as high birth as she is, nor as fortunate. Normally the princess ends up married to the dragon-slayer, though sometimes after an imposter has by threats intimidated her into silence, and the dragon-slayer has had to demonstrate the truth.
The motifs of the hero who finds the princess about to be sacrificed to the dragon and saves her, the false hero who takes his place, and the final revelation of the true hero, are the identifying marks of the Aarne-Thompson folktale type 300, the Dragon-Slayer, and appear, with other elements before and after in type 303, the Two Brothers. These two tales have been found, in different variants, in countries all over the world.
The "princess and dragon" scenario is given even more weight in popular imagination than it is in the original tales; the stereotypical hero is envisioned as slaying dragons even though, for instance, the Brothers Grimm had only a few tales of dragon and giant slayers among hundreds of tales.
One of the earliest example of the motif comes from the Ancient Greek tale of Perseus, who rescued the princess Andromeda from a sea monster. This was taken up into other Greek myths, such as Heracles, who rescued the princess Hesione of Troy from a similar sea monster. Most ancient versions depicted the dragon as the expression of a god's wrath: in Andromeda's case, because her mother Cassiopeia had compared her beauty to that of the sea nymphs, and in Hesione's, because her father had reneged on a bargain with Poseidon. This is less common in fairy tales and other, later versions, where the dragon is frequently acting out of malice.
The Japanese legend of Yamata no Orochi also invokes this motif. The god Susanoo encounters two "Earthly Deities" who have been forced to sacrifice their seven daughters to the many-headed Orochi. Susanoo kills the dragon.
Another variation is from the tale of Saint George and the Dragon. The tale begins with a dragon making its nest at the spring which provides a city-state with water. Consequently, the citizens had to temporarily remove the dragon from its nest in order to collect water. To do so, they offered the dragon a daily human sacrifice. The victim of the day was chosen by drawing lots. Eventually in this lottery, the lot happened to fall to the local princess. The local monarch is occasionally depicted begging for her life with no result. She is offered to the dragon but at this point a traveling Saint George arrives. He faces the dragon, slays it and saves the princess. The grateful citizens then abandon their ancestral paganism and convert to Christianity.
When the tale is not about a dragon but a troll, giant, or ogre, the princess is often a captive rather than about to be eaten, as in The Three Princesses of Whiteland. These princesses are often a vital source of information to their rescuers, telling them how to perform tasks that the captor sets to them, or how to kill the monster, and when she does not know, as in The Giant Who Had No Heart in His Body, she frequently can pry the information from the giant. Despite the hero's helplessness without this information, the princess is incapable of using the knowledge herself.
Again, if a false claimant intimidates her into silence about who actually killed the monster as in the fairy tale The Two Brothers, when the hero appears, she will endorse his story, but she will not tell the truth prior to them; she often agrees to marry the false claimant in the hero's absence. The hero has often cut out the tongue of the dragon, so when the false hero cuts off its head, his claim to have killed it is refuted by its lack of a tongue; the hero produces the tongue and so proves his claim to marry the princess. In some tales, however, the princess herself takes steps to ensure that she can identify the hero—cutting off a piece of his cloak as in Georgic and Merlin, giving him tokens as in The Sea-Maiden—and so separate him from the false hero.
This dragon-slaying hero appears in medieval romances about knights-errant, such as the Russian Dobrynya Nikitich. In some variants of Tristan and Iseult, Tristan wins Iseult for his uncle, King Mark of Cornwall, by killing a dragon that was devastating her father's kingdom; he has to prove his claim when the king's steward claims to the be the dragon-slayer. Ludovico Ariosto took the concept up into Orlando Furioso using it not once but twice: the rescue of Angelica by Ruggiero, and Orlando rescuing Olimpia. The monster that menaced Olimpia reconnected to the Greek myths; although Ariosto described it as a legend to the characters, the story was that the monster sprung from an offense against Proteus. In neither case did he marry the rescued woman to the rescuer. Edmund Spenser depicts St. George in The Faerie Queene, but while Una is a princess who seeks aid against a dragon, and her depiction in the opening with a lamb fits the iconography of St. George pagents, the dragon imperils her parents' kingdom, and not her alone. Many tales of dragons, ending with the dragon-slayer marrying a princess, do not precisely fit this cliché because the princess is in no more danger than the rest of the threatened kingdom.
Modern usage 
In Sleeping Beauty, Walt Disney concluded the tale by having the wicked fairy godmother Maleficent transform herself into a dragon to withstand the prince, converting the fairy tale of the princess and the dragon.
In Ian Fleming's Dr. No both the book and film versions feature a tank in the shape of a dragon that protects Dr No's island from superstitious intruders. James Bond and Honeychile Rider are menaced by the dragon, do battle with it, have their friend Quarrel killed and are captured by the crew of the Dragon tank. Ann Boyd's 1967 book The Devil With James Bond explores the theory of the updating of the Princess and dragon genre.
A subversion of the concept for young readers is Robert Munsch's The Paper Bag Princess, in which a princess outwits a dragon to save a prince (her betrothed, whom she proceeds not to marry upon him insulting her makeshift clothing instead of thanking her).
In Jay Williams's tale, "The Practical Princess," a dragon demands that a king should sacrifice his daughter to him so that he will leave the rest of the kingdom alone. But the princess saves herself by making a "princess dummy" out of straw, and filling it with boiling pitch and tar. The princess dresses the dummy in one of her own gowns, then goes to the dragon's cave where she offers herself as a sacrifice. The unwitting dragon swallows the straw dummy whole, and the pitch and tar explodes inside the dragon's stomach, killing him. Afterwards, the princess observes, "Dragons are not very smart."
In the Isaac Asimov short story "Prince Delightful and the Flameless Dragon," it is revealed that Dragons used to be slain as part of a passage from princehood to adulthood, though after a while, they became a protected species. Contrary to popular myth, they don't eat princesses as they tend to smell of cheap perfume and give indigestion.
In some stories, mostly in more recent literary works, the cliche involving princesses and dragons is somehow twisted to create a more exciting or humorous effect. For example, in The Paper Bag Princess, the princess came to realize that her prince was even more obnoxious than the dragon, and refused to go with him, preferring to skip off into the setting sun alone instead. In some versions, the princess may also befriend, tame, personally defeat, or even be turned into a dragon herself. Indeed, there are a few examples when a curse or spell transforms a princess into a dragon or similar creature (e.g. an alligator, giant bird, or fictional reptile species). In such stories, the transformed princess usually aids her sweetheart in a battle against a force of evil. In The Swan Princess, for example, Princess Odette is transformed into a giant swan, and she helps her lover triumph in a battle against the sorcerer Rothbart, who has the power to transform himself into a hideous beast (a manifestation of a lion, wolf, and bear).
Tales with princess and dragons 
- Andromeda (mythology)
- The Dragon with Seven Heads in Italo Calvino's Italian Folktales
- The Two Brothers, collected by the Brothers Grimm
- The Three Dogs
- The Three Princes and their Beasts
- The Nine Peahens and the Golden Apples
- The Sea-Maiden
- The Thirteenth Son of the King of Erin
- The Bold Knight, the Apples of Youth, and the Water of Life
- The Little Bull-Calf
- The Three Enchanted Princes
- The Merchant
- Georgic and Merlin
- Dragon's Lair
- King's Quest III: To Heir Is Human
- Saint George and the Dragon
- Blazing Dragons (here, the knight's and the dragon's roles are reversed)
- A Song of Ice and Fire
Tales with princesses and similar perils 
- Tales of Rabbi Nachman 1: The Lost Princess
- Walt Disney's Sleeping Beauty
- The Legend of Zelda
- Super Mario Bros.
- The Giant Who Had No Heart in His Body
- The Red Ettin
- Soria Moria Castle
- Star Wars
- Tritill, Litill, and the Birds
- The Death of Koschei the Deathless
- The Crystal Ball
- The Flea
- The Ramayana
- Johan Huizinga, The Autumn of the Middle Ages p 83 ISBN 0-226-35992-1
- Northrop Frye, Anatomy of Criticism, p 189, ISBN 0-691-01298-9
- Stith Thompson, The Folktale, p 24-5, University of California Press, Berkeley Los Angeles London, 1977
- Stith Thompson, The Folktale, p 27, University of California Press, Berkeley Los Angeles London, 1977
- Maria Tatar, p 282, The Annotated Classic Fairy Tales, ISBN 0-393-05163-3
- Max Lüthi, Once Upon A Time: On the Nature of Fairy Tales, p 54, Frederick Ungar Publishing Co., New York, 1970
- Johan Huizinga, The Autumn of the Middle Ages p 84 ISBN 0-226-35992-1
- Anne Wilson, Traditional Romance and Tale, p 46, D.S. Brewer, Rowman & Littlefield, Ipswitch, 1976, ISBN 0-87471-905-4
- Francis James Child, The English and Scottish Popular Ballads, v 1, p 306, Dover Publications, New York 1965
- John Grant and John Clute, The Encyclopedia of Fantasy, "Sleeping Beauty" p 874 ISBN 0-312-19869-8