In which film is Severus Snape a character?

In which film is Ron Weasley a character? 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'? Who played Rubeus Hagrid in 'Harry Potter and the Sorcerer's Stone'? In which film is Rubeus Hagrid a character? Who played Lord Voldemort in 'Harry Potter and the Goblet of Fire'? In which film is Lord Voldemort a character?