LONDON: Acclaimed director Steven Spielberg says the 9/11 terrorist attack in the US in 2001 changed him a lot and made his work "darker".

"9/11 changed a lot for me. It changed a lot for everybody in the world. And my films did grow darker after 9/11," contactmusic.com quoted Speilberg as saying.

"’Minority Report’ was a very dark look at the future, and certainly ‘War of the Worlds’, which was a very direct reference to 9/11. It was a real post-9/11 story. Not intended that way, but that’s the way it turned out," Spielberg said.

"So I think the world has a great impact on how it colours my movies. I think that’s a good sign. It just means I’m changing by being aware of what’s happening," said the "Avatar" director.