Since his astounding first appearance in the 1997 novel "Harry Potter and the Sorcerer's Stone" (aka "The Philosophers Stone" in Europe), Harry Potter has become perhaps one of the most well known, and globally adored, fantasy book characters in the world today.

The success of the novels soon led to a movie to be produced, based on the first novel of the series. Its success has not only led to a series of sequels, but has helped fuel the worldwide craze for the spellbinding wizard, and the films lead actor, Daniel Radcliffe.

However, speculation is growing that the young actors who star in the film series might be getting ready to spread their wings, and leave Hogwarts behind.

"It would be amazing to have the whole series with the same kids," said Alfonso Cuaron, director of the latest Potter movie, "Harry Potter and the Prisoner of Azkaban."

"It would be priceless. It would be something very special, for the ages."

"Azkaban" is the third movie of the series, which could go on for as many as four more films. Radcliffe and real life sidekicks Emma Watson (Hermione) and Rupert Grint (Ron) said they are all enthusiastic about the Potter film series, but physically, they might soon outgrow their characters.

Each of them signed on for one film at a time, and production has already begun on the fourth movie, "Harry Potter and the Goblet of Fire," which is directed by Mike Newell. Newell also directed "Four Weddings and a Funeral," and more recently, "Mona Lisa Smile" which starred actress Julia Roberts.

In "Goblet of Fire," each of the magicians in training are supposed to be 14 years old, which matches Watson's age. However, Radcliffe himself will be 15 in the summer, and Grint 16.

"Right now they're doing No. 4," Cuaron said. "There's only three more to go. I just hope they keep the same cast for the whole thing."

Cuaron also added that he would love to direct them again. He mentioned that it would be a landmark achievement for the trio that first created the roles to make it through to the end.

"So far, they're holding up very good, the way that they are aging," Cuaron said. "I don't think Dan is going to get way much taller or suddenly grow another eye. Same with Emma, and Rupert is OK." says Cuaron. "Let's hope. In the last one they're supposed to be 17. Say they're 19, I think they're going to be very good, that would be very special."

"Harry Potter and the Prisoner of Azkaban" opens worldwide June 4.

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