This is exactly what I came in to post. I’d watch the show if it weren’t for the accents.
Dick Van Dyke, much as I love his stuff, probably had the worst accent ever filmed.
“Ho, h’its aie jowlly 'olleeday wiv yew, Mawy Poppins!”
The horribleness of the accent adds something to the charm of the film, but it’s still just ghastly bad.
Also, whatshername–the sister from Arrested Development who was Ted’s hotter-than-hell boss in the long gone but much lamented “Better off Ted” has a weird American accent. I don’t know where she’s from, but she keeps mispronouncing words, just slightly. (C’n’t instead of “Can’t”, for example. It’s very…clipped.)
Portia de Rossi? She’s from Australia.
Portia de Rossi (AKA, Mrs. DeGeneres) is from Australia. I think that her American accent is pretty good.
No one agrees with me on this, but I thought that both Matt Damon and Minnie Driver sounded hideous as they attempted Boston accents in Good Will Hunting. Everyone counters with, “but Matt Damon was FROM Boston.” Yeah, but Newton and Cambridge don’t talk like South Boston. It still astonishes me that people don’t hear just how terribly they both faked the accents in that movie.
Minnie Driver was putting on a Boston accent? I thought she was just using her natural British one.
Not actually an actor, but I just had Gerry & The Pacemakers doing “Jambalaya” come up on iPod shuffle.
I can assure you that Gerry does a really, really bad Cajun accent.
Renee Zelweger is ok when using her native Texas voice but she destroyed Bridget Jones. Whose dumb idea was that? Britain run out of actresses?
Keira Knightley does not do American well. She’s no Hugh Laurie.
Marlon Brando in Mutiny on the Bounty.
Doh! I meant Philly accent. It was so bad I couldn’t even place what it was supposed to be. :smack:
Alec Baldwin in The Departed. So bad they made fun of it on 30 Rock a few years later.
100% of English people I’ve seen with any opinion on it has said that her English accent is good to great.
That’s why I can’t watch movies set in North Carolina. They never get the regional accents right.
Two exceptions:
- Zack Galifinakis, who is from Wilkesboro and knows what he’s doing.
- Blue Velvet where they didn’t even try for an accent even though it’s set in Lumberton.
I can’t stand it. It sounds over the top to me. I only remember discussing it with one British person who also hated it so it’s possible I’m not of the popular opinion.
Fargo season two was interesting. Even Kirsten Dunst said it was easy to slip right out of Minnesota and into Ireland.
FWIW I thought it was extremely accurate in terms of the social placement. Someone in Bridget Jones’s sort of job would very likely have that sort of Sloaney voice, at least in the first movie.
I also thought Gwyneth Paltrow pretty convincing in Sliding Doors.
I think House’s accent is pretty bad, so I know of unpopular opinions on this topic.
Tom Bosley in his (coastal Maine?) accent in “Murder, She Wrote.”
No, Diana Lane in “The Perfect Storm” beats every other fake Boston accent.
https://www.yahoo.com/movies/bp/worst-boston-accents-film-according-real-bostonians-234810485.html
I guess I’m the first to mention Sullivan Stapleton’s lousy American accent in this thread, but that’s probably because I’m the only one still watching “Blindspot”. 
And as mentioned upthread, Hayley Atwell’s American accent in her new show is awful. However, I could sit and listen to her British accent all day.
It sounds like she’s trying.
When most people speak, it doesn’t sound like they have to think about the sounds. The words just come spilling out (when Zellwegger speaks in her own accent, it sounds like that). When she speaks in a British accent, it sounds like she’s thinking about every single syllable that comes out of her mouth. It’s really forced & laboured and the rhythm is just odd, especially compared to the other (actually British) people in the movie who have a much more natural cadence.