She arrived at the “Watch What Happens Live” set wearing the long-sleeved turquoise piece with black tights and pointed pumps.

Her outfit also included a thin fabric belt tied messily around her waist.

Though the blazer’s vibrant color worked on Coughlan, her outfit could have benefited from sharper tailoring and different accessories — maybe a sparkling brooch or a fun handbag.

Coughlan looked like a modern-day version of Penelope Featherington in her expensive outfit, which included a $1,550 silk blouse underneath a $1,990 wool shift dress.

And when accessorized with a $325 headband and a small $1,995 purse, the outfit became even more feminine and fun.

But the white and cream shades of the above pieces were almost too light. The same outfit in a different color — maybe all black or lavender — would have worked better.

She attended the runway event wearing a $2,725 Vivienne Westwood design. It had a scooped neckline embellished with a bow, a knee-length skirt, and loose long sleeves.

Coughlan also wore rhinestone-studded Louboutin sandals that cost $1,795 and carried a $3,290 matching purse.

The outfit was great for a night out, especially when paired with the red lipstick she wore.

But when compared to the more fashion-forward looks Coughlan has worn this year, it doesn’t ultimately stand out.

Coughlan attended a “Bridgerton” event in London that month wearing a $2,700 Stella McCartney blazer as a dress and the designer’s $895 fuzzy, vegan heels.

The two pieces worked great together, and red is undoubtedly Coughlan’s color.

Unfortunately, her dress was almost too oversized, with sleeves that extended past her hands. If they had been tailored shorter, her outfit would have been close to perfect.

At a party hosted by British Vogue and Tiffany & Co., Coughlan wore a Stella McCartney blazer dress with a neckline that nearly reached her navel.

But rather than wearing the garment alone, the actor paired it with a Styland mesh blouse, semi-sheer tights, and black sandals.

The outfit was sharp and chic and worked perfectly for an evening party.

For a British Vogue event in London, Coughlan wore two black pieces from Styland: a $3,207 strapless top covered in Ostrich feathers and $203 satin pants with pleats.

The lines of the latter piece made Coughlan look much taller than she is, and the feathered top was the perfect piece to contrast the silky texture of her pants.

While on the “Renegade Nell” carpet, Coughlan was photographed wearing a coat-style dress in an off-green shade.

It had thick shoulder pads, a deep neckline, and a slit in the middle of its skirt that revealed her platform heels. She also wore two black belts wrapped around her waist.

The outfit was simple but effective and suited Coughlan’s tiny frame. And though she carried a clear umbrella to combat London’s rainy weather, it complemented her dress perfectly as an accessory.

She attended an event for her series “Big Mood” in a knee-length black dress with ruched fabric and short puffy sleeves draped beneath her shoulders.

The elegant dress also had a scooped neckline with two sparkling cups poking out of it, adding extra glamour to the piece.

The dress was styled sharply on Coughlan with black tights, pointed pumps, and an updo hairstyle that kept all eyes on her outfit.

She walked the event’s carpet in a black Roland Mouret jacket dress and a leather corset designed by Misho. Together, the two pieces would have worked on any New York Fashion Week runway.

But Coughlan really nailed the look with her accessories and makeup. She wore various metallic rings, gold statement earrings, and burgundy lipstick.

She wore a sleeveless maroon gown from the fashion house decorated with sparkling floral appliqué. It also had a deep scooped neckline, a satin bodice, and an ankle-length skirt.

Coughlan would have looked stunning if she wore the dress with no accessories. But instead, she made the gown into a dramatic fashion statement by wearing gloves that ballooned above her elbows.

It turned out to be one of her best fashion moments of the year so far.

Richard Quinn custom-made her black dress with off-the-shoulder sleeves, a U-shaped neckline, and a tulle pleated skirt.

Its full silhouette nodded to the regency era of “Bridgerton,” and its sparkling details were ideal for this season’s leading actor.

Coughlan wore the dress with black sandals and minimal jewelry.