Actors that will forever be defined by that one character that they played

Robert Downey Jr. as Tony Stark/Iron Man.

Try thinking of someone else playing the role of Iron Man.. it is going to take you maybe indefinite time to come up with a better name than Robert Downey Jr.

Daniel Radcliffe as Harry Potter.

I am sure many of us will have him in our list. This is a no-brainer. There is no way anyone else could have done a better job at being Harry Potter than Radcliffe.

Emma Watson as Hermione Granger.

Since we have Daniel Radcliffe for being Harry Potter, including Emma Watson in the list as Hermione Granger is also a no brainer. It would be weird to think of someone else as Hermione to be honest. At that point of time, when these actors were still kids themselves, Emma Watson nailed the role of Hermione.

And Rupert Grint as Ron Weasley.

Okay, who knew this was coming? I mean you can’t add two of the trio and leave the third one out. The casting of the Harry Potter movies was amazing and no one could have done a better job than these three, in my opinion.

Arnold Schwarzenegger as The Terminator.

Even though he has gotten older now… he can still take on the role better than anyone else.

Mark Hamill as Luke Skywalker.

True Star Wars fans wouldn’t deny this.

John Krasinski as Jim Halpert.

Well, this seems like a role that any other good actor could have pulled it off but does it really? I mean I gave it a few minutes thought and I seriously couldn’t come up with a better guy to smirk at the camera than John.

The entire cast of Friends

This can actually be a challenge to think of someone else to replace any of these guys..