While I've read Grimms Märchen front to back several times as a child I've never read any fairy tales in English before. I thank Margarate Hunt (whoever she might be) for her translation of the Frog Prince – I relied heavily on it.
Neither Harry Potter nor the Froschkönig belongs to me.
The Princess and the Frog
In a land both far away and yet so near there lived a king who had two daughters. They were both handsome, but the youngest had skin as white as a lily, hair that shone like fire and eyes as green as the first leaves of spring. She was so beautiful that the sun himself lingered each time he passed over her.
Near the castle there was a great dark wood, and in the wood there flowed a river. And when the day was hot, the king's daughters used to go forth into the wood and sit on the riverside, and if the time seemed long they would play in the shallow water.
Now it happened one day that they went into the wood, and a voice hailed them. And when they looked to see where the voice came from, there was nothing but a frog stretching his thick ugly head out of the water.
The oldest looked at him in disgust and said, "Go away, we do not want to play with an old waddler like you."
But the youngest looked at him kindly and even reached out to let him hop onto her hand.
"You are special", the frog told her, "you are like me."
At first the princess was offended, but then she laughed. "Come play with us, dear frog", said she. And they did.
And for a time, whenever the young maiden came to the river the frog would await her, and they would play together in the shallows.
But then one day it happened that the frog croaked shyly, "Dear maiden, I would ask you a favour. If you would grant me just one kiss?"
For you see, the frog was really a prince that had been turned into a frog by an evil sorcerer, and her kiss would free him from the wicked spell.
Of course, the princess did not know this, and she found the frog disgusting, even if he was her friend. She also did not like that he sometimes talked to the wolf who came down to the water to drink.
Thus, the princess told the frog, "I will never kiss you." And she went away and did not come to see him again.
The frog was sad, but he was also enraged. The wolf, who sensed this, came to him more often, and the frog told him about the princess. And the wolf grinned to himself and the next day he went to the castle and waited for the princess. And when she came out the wolf ate her as his midday meal.
When the frog heard of this he grew sad, for he had liked the princess even if he had been angry for a while. And so he set out to take revenge on the wolf who had eaten his friend.
The frog himself did not realise it, but while he chased the wolf, the love he bore for the princess began to slowly gnaw on the curse and change him. And behold! after many years on the chase he was a handsome prince again.
So in the end the princess still turned the frog into a prince. Alas, as she had not kissed him he could not live happily ever after, and instead grew bitter and died at a young age.
But in the end he caught up to the wolf and wrestled him, and when he stilled forever, the wolf also took his last breath. And the prince, if he had been there to see it, would have smiled and counted it as a victory.