Who were the main characters of the first Harry Potter movie?

The main characters in Harry Potter and the Philosopher's Stone are Harry Potter, Ron Weasley, Hermione Granger, Albus Dumbledore and Lord Voldemort/Quirrell.

There are also lots of important secondary characters who play a large role throughout the series. These include Rubeus Hagrid, Professor Minerva McGongall, Professor Severus Snape, Neville Longbottom and Draco Malfoy.