The King is the ruler of the kingdom and the father of Snow White.
Snow White's mother died in child birth, and her father (Sean Bean), trys to spoil the young girl, he could aford to, he was the king. The king loved his daughter and all is subjects loved him the kingdom was a happy place where people danced and singd all day and night. The King raised his dautghter by himself, grooming her to one day lead. But over time he relized that their were somethings he could not teacher so he looked for a new queen and (under the spell of her love potion) marries Clementianna (Julia Roberts), the most beautiful woman in the land and raises Snow White. One day, the king leaves to fight a great evil that has invaded the land (leaving Snow White his favorite dagger) but never returns. Snow White searched and searched for her father but when she finaly relized that he was truly gone she was devastated and now left under the care of the queen. Queen Clementianna rules in his absence and keeps Snow White in the palace.
It is belived that the king was killed by the beast but he is actuly transformed into a beast when Snow was eight and never seen again until the queen sets him on Snow at the end of the film. She slices throught he half-moon necklace which keeps him under the queen's power and so he is returned to his original form and happily marries Snow and Alcott at the end.