Not sure in which section this belongs, but I just found this piece of interesting info.

BBC NEWS Friday, 17 May, 2002

Star Wars director George Lucas has attacked the idea of using technology to recreate dead film stars.
"It's something we are trying to stop happening, although you can't stop technology and you can't stop change," he said.
The director was at the Cannes film festival for the screening of his latest film, Star Wars Episode II: Attack of The Clones.
Advances in digital technology have raised the prospect of long-dead stars like John Wayne and Marilyn Monroe being brought back to life on-screen.
The technology has already been used in less conspicuous ways.
When veteran British actor Oliver Reed died during filming of the Roman epic Gladiator, some scenes were digitally altered to make it look as if he was present.
But Lucas said that, despite its occasional usefulness, the technique would lead to the "caricature" of famous film presences.
"A computer can duplicate Tom Hanks, for example, and we already use that technology a little for stunts and difficult scenes.
"But if you bring back Marilyn Monroe, what you would have is a caricature.
"You could do it but you can't get a perfect actor.
"Acting is a human endeavour and the amount of talent and craft that goes into it is massive - and can a composite reproduce that?"
He added: "The voice would have to be dubbed and what was produced on screen would ultimately be the work of an animator."
The director was one of the first to make extensive use of digital technology when he used computer-generated special effects in the original Star Wars film in 1977.
But he said that recreating Hollywood greats would be a step too far.
"I can't see any reason to recreate John Wayne or Monroe.
"People don't want to see an imitation of someone who was a strong presence in real life," said Lucas.

Rumor Control: George Lucas Is Not Reanimating Dead Movie Stars
http://www.wired.com - December 6, 2010
Is Star Wars creator George Lucas planning to digitally reanimate dead movie stars and insert them into a CGI film of his own devising? Uh, no.

The “I cast dead people” scenario that’s making the rounds on the web is not true, according to Lucasfilm spokesman Josh Kushins. “This rumor is completely false,” he told Wired.com in an e-mail Monday.

The wild rumor, which was picked up by news outlets around the web, started after Mel Smith, who directed Lucas’ Radioland Murders script back in 1994, was quoted in London tabloid The Daily Mail.

“[Lucas has] been buying up the film rights to dead movie stars,” Smith reportedly told the paper, “in the hope of using computer trickery to put them all together in a movie, so you’d have Orson Welles and Barbara Stanwyck appear alongside today’s stars.”