2. Michael Caine - The Weather Man (2005)
Michael Caine arguably has one of the most distinguished and recognisable voices in film. His charming cockney brogue has been lovingly imitated by impressionists for years, and it has a comforting and familiar quality that is synonymous with him, allowing the actor to excel in playing a range of roles with his cheeky wide-boy demeanour and a playful glint in his eyes - the guy simply oozes British icon. So when Caine breaks out of his mother tongue and delves into another accent, it's distracting, disappointing, and bound to fail. In the comedy-drama The Weather Man - I may be in a minority, but I really do love it - Caine plays downtrodden Nicolas Cage's wise old father, offering Cage guidance and advice on his sh*tty life. Only without the cockney charm, out comes an accent where the advice doesn't have the same gravitas to it, and you're suddenly listening to a blithering mad man where your only thought is: what accent are you even attempting, Michael?!