It happened on… April 17

Premiere of the TV series “Game of Thrones,” based on the novels by George R. R. Martin, on HBO.

Premiere of Kenneth Branagh’s film “Thor,” starring Chris Hemsworth and Natalie Portman, in Sydney, Australia.

Filmmaker George Lucas begins writing “Star Wars.”

Paul McCartney releases his first solo album, “McCartney.”

Daffy Duck, the Warner Bros. character, makes his first appearance in “Porky’s Duck Hunt.”