Who are the three actors who play dumledore in Harry Potter?

You're right! It's actually four actors who have portrayed Dumbledore in the Harry Potter films:

1. Richard Harris played Dumbledore in the first two films, *Harry Potter and the Sorcerer's Stone* and *Harry Potter and the Chamber of Secrets*.

2. Michael Gambon took over the role for the remaining six films, from *Harry Potter and the Prisoner of Azkaban* onwards.

3. Derek Deadman played a younger Dumbledore in a flashback scene in *Harry Potter and the Half-Blood Prince*.

4. Jude Law is set to play a younger Dumbledore in the "Fantastic Beasts" film series.

Let me know if you have any other Harry Potter questions!