* Lord of the Rings: He played the iconic role of Gandalf the Grey (and later Gandalf the White) in all three *Lord of the Rings* films.
* Harry Potter: He played the role of Professor Albus Dumbledore in the last three *Harry Potter* films, starting with *Harry Potter and the Order of the Phoenix*.
It's interesting to note that he played two very different, but equally powerful and beloved characters in these two fantasy franchises.