Hello, everyone! My name is Kayla and this is my lovely Australian friend, Natalia.

While the two of us don't share the same time zone, since I'm based in the USA and she's based in Australia, one of our shared interests is our love for Australian characters in movies. However, as I'm not super well versed when it comes to spotting good or bad accents in films, I thought I'd bring in my own Aussie expert to set the record straight when it comes to these actors' portrayals of our friends down under.
Kate McKinnon in Rough Night

Listen to her accent here at 0:35:
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Natalia's thoughts: Yeah look, as much as I like Kate McKinnon, listening to her do the Aussie accent makes my skin crawl. It's bad. It moves between Aussie, American, and Kiwi, yet sounds like none of them at the same time. Very inauthentic.
Authentic Aussie meter: 1/10
Listen to his accent here at 1:03:
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Natalia's thoughts: This is terrible. But, because it's Quentin Tarantino, I almost expect that to be part of the schtick?
Authentic Aussie meter: 3/10
Max Martini and Robert Kazinsky in Pacific Rim

Listen to their accents here:
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Natalia's thoughts: Okay, this is straight-up not good. Robert Kazinsky sounds English — and even Welsh at times — whereas Max Martini sounds like he's learned the Australian accent from The Crocodile Hunter.
Authentic Aussie meter: 4/10
Meryl Streep in Evil Angels

Listen to her accent here at 0:15:
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Natalia's thoughts: This is...not the best. Meryl's Aussie accent drops in and out here, and at times even sounds South African to me. However, it was the '80s and the Aussie accent that was celebrated on media was a lot more British sounding, so I'll cut her some slack there.
Authentic Aussie meter: 5/10
Daniel Radcliffe in December Boys

Listen to his accent here at 0:58:
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Natalia's thoughts: No matter what accent Daniel Radcliffe uses, I only hear Harry Potter. His Aussie accent is alright, but definitely over the top.
Authentic Aussie meter: 6/10
John Lithgow in Pitch Perfect 3

Listen to his accent here:
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Natalia's thoughts: This accent is neither here nor there. I can pick up that he's playing an Aussie, but like, John Lithgow is an accent in its own right.
Authentic Aussie meter: 6/10
Benedict Cumberbatch in The Fifth Estate

Listen to his accent here at 0:30:
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Natalia's thoughts: This isn't that bad! Pretty passable for an Aussie accent — but I would think it was from someone who was born overseas or grew up in a fancy area. You can hear his British accent come through in phrases like "his own person" — but other words, like "truth" and "whistleblower," are pretty on point for Aussie pronunciation.
Authentic Aussie meter: 7/10 would pass
Kate Winslet in Holy Smoke!

Listen to her accent here at 0:15:
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Natalia's thoughts: Pretty good! Again, you can hear some of the British coming through, mainly because she actually pronounces the letters at the end of the words. Us Aussies don't do that.
Authentic Aussie meter: 7/10
Liev Schreiber in Mental

Listen to his accent here at 1:27:
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Natalia's thoughts: Liev's accent is excellent here. But I also think the fact that he plays the silent, brooding male type here probably helps — they don't say that much anyway.
Authentic Aussie meter: 9/10
Robert Downey Jr. in Natural Born Killers

Listen to his accent here:
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Natalia's thoughts: I wanted to hate this one, but it's actually really good. It's a little stereotypical, but once he starts ranting, you realize how much he's really nailed the intonation here.
Authentic Aussie meter: 9/10
Emily Blunt in Irresistible

Listen to her accent here:
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Natalia's thoughts: I'm trying not to be biased because I love Emily Blunt, but this accent is really good. It's not as overdone as some of the others, but she really nails the vowel sounds.
Authentic Aussie meter: 9/10
Dev Patel in Lion

Listen to his accent here at 0:23:
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Natalia's thoughts: Dev Patel's accent is flawless in this film. I remember watching it at the cinemas and thinking, "Damn, he really nailed this."
Authentic Aussie meter: 10/10