Does anyone seriously imagine you just call up John Hurt on the spur of the moment and offer him a job?
Ask Ridley Scott. Hurt was a last-minute substitute on Alien
when his original choice for Kane, Jon Finch, had a diabetic attack on the set in the first days of filming.
Eh?? at that point he was just another jobbing actor??? Yes he had done a few important TV roles but completely different context.