Actors who are so strongly identified with a character that it is hard to dissociate the two.

Or the opposite take, Dolly Parton always plays Dolly Parton whenever she “acts”.

Sarah Gellar as Buffy and Daniel Radcliffe as Harry Potter (I had to Google Daniel’s name as I just think of that actor as “Harry Potter”).

Don Knotts will always be Mr. Furley to me!
Mary Tyler Moore will always be Mary Richards, a fresh-faced Minneapolis-living young single (not divorced) woman celebrating her unattached existence by spinning around and twirling her hat in the air as a perplexed old lady looks on.

I disagree with most of these. George C. Scott as Patton only? Haven’t you seen him in plenty of other films, as other characters. His version of A Christmas Carol is one of my favorites.
Leslie Nielsen was in plenty of other films before he started acting for the brother Zucker and Abraham. In particular, he was Commander J. J. Adams in ** Forbidden Planet** – but that barely scratches the surface.
Jackie Gleason? Heck, he’s had plenty of non-Ralph Kramden roles. I think he did Gigot partly to show he could do something completely different.

David Tennant? He was a totally different character as Barty Crouch jr. in Harry Potter and the Goblet of Fire – a popular movie if ever there was one.

I think most of these “type cast” judgments come from only seeing the actor in one role, which tells me that a lot of you haven’t seen enough movies. The only one I’d agree on is George Reeves being typecast as Superman. I’ve seen him in a few other things, but not enough of them. It’s still a shock to see him (in color!) in Gone with the Wind as one of the Tarleton Twins.

I can’t believe nobody mentioned John Wayne. He played himself in every goddamn movie.

Huge Laurie has 83 acting credits, not including House. He’s been something of a star in Britain for years and years.

He might be typecast in the US, but he certainly isn’t elsewhere.

See, I never watched Married With Children on any kind of regular basis, so for me Ed O’Neill is just kind of shlubby everyman. I love him in Modern Family, it’s my favorite new show this season.

But speaking of Mw/C, Katey Sagal seems to be typecast based upon her speaking voice, that whole high-pitched whiny/needling thing she does.

What!? I don’t even think I had accepted him as the Doctor before he left!
Personally, I would say Tom Baker might be more inseparable from that role.

Roger Moore - I know there has been other James Bonds but it was the pinnacle of his career.

I think the whole cast of Cheers should probably just change their names, especially Frasier, Carla, Norm and Cliff.

I remember one miniseries where Patton was played by Darren McGavin, who looked and sounded much more like the real thing - but this is a case where the legend is better served by futzing with the truth a bit…

Rowan Atkinson as Bean

And yet Nimoy was the first ST regular to have a recurring role (as “Paris”, he replaced Martin Landau on the Mission Impossible team). Amusingly, Shatner had (different) roles as the antagonist they outwitted in several episodes.

You really owe it to yourself to catch Sons of Anarchy.

If anything, Blackadder, but he’s done enough other stuff that I don’t see him as really typecast.

There’s a live journal community devoted to getting him to play Moriarty in the next Sherlock Holmes movie. It strikes me as a little too on the nose, like it would be almost distracting to have him in that role - and I don’t care. It has to happen.

Personally, I find it weird to see him in any serious role. I watched two episodes of House before I gave up and realized he wasn’t going to ask Jeeves for advice or sing a ribald ditty about inserting things into anuses.

Bela Lugosi as Dracula. Christopher Lee would also be in this for his version of Dracula except for the whole Saruman thing in the LOTR trilogy.

As for TV, recently I’ve realized that I’ll always see the two leads from Supernatural (Jared P. and Jensen A.) as Sam and Dean Winchester; this became really evident to me when watching the Friday the 13th reboot, and thinking “Jason should SO be toast right now, Sam Winchester is there!” And I had similar thoughts with Jensen A. in Bloody Valentine; I kept on thinking he’d eventually pull up in his black '67 Impala with Foghat blasting out the speakers, and pull some weapons out of the trunk.

No, she is Captain Turanga Leela from Futurama, not at all like Marge Bundy.

The one that I really, really can’t separate from the character is the guy who did Father Guido Sarducci in the early 80s.

Peg Bundy.

Don Novello was Father Sarducci.

I have a hard time watching anything with Hugo Weaving in it without thinking of his roles in LOTR and The Matrix series. He’s a good actor and the roles are very different, but they’re mentally associations that stuck with me.

Rowan Atkinson will forever be typecast in my mind as Bean or some other similarly goofball character type-- I can’t imagine him in a truly serious role.

Whoah! Hugo Weaving was V in V for Vendetta!