In which film is Ron Weasley a character?

Who played Harry Potter in 'Harry Potter and the Sorcerer's Stone'? Who played Hermione Granger in 'Harry Potter and the Sorcerer's Stone'? In which film is Hermione Granger a character? Who played Ron Weasley in 'Harry Potter and the Sorcerer's Stone'? Who played Albus Dumbledore in 'Harry Potter and the Sorcerer's Stone'? In which film is Albus Dumbledore a character? Who played Severus Snape in 'Harry Potter and the Sorcerer's Stone'? In which film is Severus Snape a character?