"Definitely Anthony Hopkins as Hannibal."

imariaprime replied: "I remember the outcry when he was cast; it was unimaginable that such a pretty boy could be the Joker.
 
That was the role that taught me to shut my mouth and give people a chance; he obliterated all opposition. I still can't actually see any of Heath Ledger in that role; I only see the Joker."

"Hugh Laurie as Dr. House. I know it's not a movie, but that casting is so good. I knew him from 'Blackadder' before and was amazed at how perfect he was as House."

"Robbie Coltrane as Rubeus Hagrid."
 
manic_laugh wrote: "JK Rowling really wanted Coltrane for Hagrid. She has said in interviews that when the books were being adapted, he had to be the first person they approached for the role."

Darkmaster666666 replied: "Stan lee himself said that RDJ is exactly how he imagined Iron-man to be. Very touching IMO."

romeowmontague replied: "Stephen King was quite impressed with Kathy Bates' performance in this film, so much so that he later wrote two more roles for her. The title role in his novel "Dolores Claiborne" was written with Bates in mind. King also wrote the script for The Stand (1994). His original novel featured a (male) character named Ray Flowers; upon hearing that Bates wanted to be involved in the miniseries, King re-wrote the part as a woman (Rae Flowers) just so Bates could play the part."

stormcrow2112 replied: "I remember early rumors of Sean Connery in the role. I’d be curious to look at that alternate reality if that would have been true or came to fruition."

"Alan Rickman as Hans Gurber in 'Die Hard.'"
 
PeevesPoltergist wrote: "Alan Rickman - Severus Snape."
 
Gogo726 wrote: "Alan Rickman in 'Galaxy Quest.' Though I could have posted just Alan Rickman and the post would have still answered the question."

Quasar_Cross replied: "In terms of appearance, Wolverine has always been super short, super hairy, not very attractive, and bulkier. Stout. In that sense Jackman didnt resemble the comicbook character. His attitude/personality? 1000% Wolverine. That's a mark a fantastic actor."

"Chris Tucker as Ruby Rhod from 'The Fifth Element.' I heard they wanted Prince, but Chris was perfect. No one was ready for that."

"Anyone other than Andre the Giant as Fezzik would be inconceivable. If only he could have played the Mountain That Rides."

"Michael J. Fox as Marty McFly and of course Christopher Lloyd as Dr. Emmett Brown."

"Tim Curry in 'Clue', 'Rocky Horror', 'Muppet Treasure Island', 'Ferngully', etc..."

A commenter replied: "Greatest action hero if all time."

"Jeff Goldblum as Malcolm in 'Jurassic Park.' On second thought all of the actors in "'Jurassic Park.'"

"The whole cast of 'The Shawshank Redemption.' Special mention to Morgan Freeman. Made Morgan's voice iconic."

AsYooouWish replied: "Fun fact: originally they wanted Shirley Temple as Dorothy"

"I'd have to say Edward Norton as Narrator and Brad Pitt as Tyler Durden in 'Fight Club.' But that entire cast was solid. They embodied the characters flawlessly from the book."

"Russell Crowe as Maximus in 'Gladiator.' The speech once he takes off the mask is goosebump-inducing epic. Quiet strength."

"Ewan McGregor as Obi Wan Kenobi. I’m glad he’ll be returning again."

"Joaquin Phoenix in 'Walk the Line.' A super Johnny Cash."

"I really liked Jamie Fox as Django. Christoph Waltz was also really good."

"Michael Scarn - played by Michael Scott. The best protagonist in the whole film industry."

"Pretty much everyone in 'The Big Lebowski.'"

"Gny Sgt. Hartman is the truest character in the film."

"Rosamund Pike as Amy Dunne in 'Gone Girl.' She perfectly embodied the Amy of the book and somehow added even more depth to the character. She was truly excellent and deserved the oscar."

"I know they botched the overall franchise but I thought Henry Cavill was the perfect Superman."

"Let's not forget Peter Stormare as Satan."

"J.K Simmons as Fletcher in 'Whiplash.' The dude was intense in that film, couldn't imagine anyone else in that role now."