It doesn't matter what else he or she does, they'll always be...

[Mr Banlon]

Napoleon Dynamite
Tony from Men Behaving Badly
Dorian from Birds of a Feather
Al Bundy

[Gulftastic]

Pretty much any cast member from Band of Brothers, except for Ross from Friends and the aforementioned Spike from Press Gang and similarly aforementioned Son of Hanks.

(plus Simon Pegg and James McAvoy, who were in it for 2 minutes each)

Same goes for everyone who was in The Wire except Method Man and Aidan Gillen.

I'll say. When Phil Leotardo got shot in 'The Sopranos', I thought to myself 'Old Guarnere don't miss nothing'.

[BeardFaceMan]

The Fonz. Winkler does a lot of good comedy these days too, but still... The Fonz.

[An tSaoi]

Harold from Harold and Kumar
Kumar from Harold and Kumar
Spock
Harry Potter
Oldboy
Lando
Frodo
Xena
Twilight Girl
Twilight Boy
Gunnery Sgt. Hartman
Matilda
Doctor Who (all of them)

I don't even bother remembering their names.

[phantom_power]

Tony from Men Behaving Badly

You mean Rocky from Boon?

[Brundle-Fly]

You mean Rocky from Boon?

No, he means Bob The Builder.

[Brundle-Fly]

I'm from the generation who only knew Orson Welles as the fat beardy bloke from the Domecq Sherry adverts. Similarly, Nanette Newman for Fairy Liquid, Victor Spinetti for Jaffa Cakes, and William Franklyn for Schweppes.

I wonder if youngsters today see Kevin Bacon, Harvey Keitel and more recently Bobby De Niro in the same light as I did in the mid-1970s. Those American old film star blokes off the adverts. If they even watch adverts.

[mothman]

De Niro is such a good actor. Or has no shame. Because you'd think anybody would visibly wilt when the line "No, not De Niro, as in Robert De Niro, it's the Niro."

[AsparagusTrevor]

The Fonz. Winkler does a lot of good comedy these days too, but still... The Fonz.

You mean Henry Winkler from Law and Order SUV?

[non capisco]

I'm from the generation who only knew Orson Welles as the fat beardy bloke from the Domecq Sherry adverts. Similarly, Nanette Newman for Fairy Liquid, Victor Spinetti for Jaffa Cakes, and William Franklyn for Schweppes.

And Cab Calloway as the guy who lived inside the sun from the Hula Hoop adverts.

[Captain Z]

John Malkovic will always be John Malkovic from Being John Malkovic in my mind.

[Keebleman]

First time I saw Scarlett Johansson was in the Coen's The Man Who Wasn't There, and since then I haven't been able to see her as anything other than a rather plain 14 year old playing at being a glamorous movie star.

[Blue Jam]

Finchy from The Office

Even in The Ballad of Buster Scruggs, in full cowboy get-up, sat on a horse, you're waiting for him to reach into his saddlebag, pull out a kettle and throw it over the local saloon.

[Brundle-Fly]

And Cab Calloway as the guy who lived inside the sun from the Hula Hoop adverts.

He's a prime example. Minnie The Moocher bloke from The Blues Brothers (1980). At the time, I thought Cab Calloway was a character created for the movie rather than an acclaimed jazz singer, performer and bandleader of the swing era.