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Since the start of the year, the 37-year-old actor has been attending movie premieres, red-carpet events, and fashion shows in standout looks. She's worn colorful minidresses, an assortment of edgy ensembles, and some ball gowns.
But she's also sported a few outfits that could have been better.
Here's a look at her biggest style moments this year, ranked from worst to best.
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The blazer dress Nicola Coughlan wore for an April TV appearance was missing something.
Nicola Coughlan on set for "Watch What Happens Live With Andy Cohen" in New York City.Bravo/Getty Images
Her white Versace ensemble, which she wore to a "Bridgerton" event in May, washed her out.
Nicola Coughlan attends a "Bridgerton" event in Milan.Vittorio Zunino Celotto/Getty Images
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The little black dress Coughlan donned at a Christian Louboutin show in March was cute but forgettable.
Nicola Coughlan attends a Christian Louboutin runway show in Paris.Dave Benett/Getty Images
A vibrant red outfit she sported in February was almost perfect.
Nicola Coughlan attends a "Bridgerton" event in London.Dave Benett/Getty Images
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The black blazer dress she wore a few days later worked better.
Nicola Coughlan attends a British Vogue and Tiffany & Co. party in London.Dave Benett/Getty Images
Coughlan showed the power of textured fabrics and good trousers in March.
Nicola Coughlan attends a British Vogue event in London.Dave Benett/Getty Images
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The actor only needed a trench coat to make a fashion statement at a London movie premiere.
Nicola Coughlan attends the "Renegade Nell" premiere in London.Karwai Tang/Getty Images
In mid-March, Coughlan experimented with old Hollywood glamour — and it paid off.
Nicola Coughlan attends a "Big Mood" screening in London.Joe Maher/Getty Images
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The corseted look she wore to another "Big Mood" event was fashion-forward.
Nicola Coughlan attends a "Big Mood" screening in New York City.Dominik Bindl/Getty Images
Coughlan could have been mistaken for a princess at Erdem's February fashion show.
Nicola Coughlan attends an Erdem runway show in London.Jeff Spicer/Getty Images
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In true "Bridgerton" fashion, Coughlan wore a sparkling ball gown during a recent trip to Australia.
Nicola Coughlan attends a "Bridgerton" event in Bowral, Australia.James Gourley/Getty Images