December is here, and that means a month of fabulous festive fashion. November teed us up nicely for a strong sartorial month, what with the Fashion Trust Arabia 2025 Award Ceremony in Doha and the LACMA Art+Film Gala drawing an array of A-listers onto the red carpet, from Cynthia Erivo and Elle Fanning to Demi Moore making waves in their finery.
This month has certainly started off strong with The Gotham Awards, celebrating a year of great film, in the presence of Julia Roberts, Kate Hudson, and Jennifer Lawrence . Across the pond, London played host to The Fashion Awards. As HELLO!'s Lifestyle writer, I love seeing what the stars wear to this cornerstone fashion event, and if you ask me, Cate Blanchett's look topped the lot.
Celebrity stylist Ellis Ranson was also a fan. "I love anything that blurs the line between a tuxedo and a gown with the classic tailoring details, the satin lapels, the white cuffs, all feeling perfect for the first night of December," she tells us.
"The minimal hair and accessories let the gown do the talking, and rocking a blazer dress is something we can all achieve for our Christmas parties. The whole look feels powerful and elegant with a touch of sexiness."
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Keep scrolling to see Cate's look and more as we bring you all the must-see celebrity fashion moments of December 2025…
She opted for a white blouse with a ruffled collar and sleeves, over which she layered the coolest double breasted pinstripe overcoat, rounding it all off with a pair of patent leather boots for a bit of a shimmer.
Actress Jessie Buckley epitomised cool casual when she attended the photocall for the Hamnet Photography Exhibition at Tristan Hoare Gallery on 16 December in London. The Wicked Little Letters star paired black wide-leg jeans with a teal cardigan.
Lily Collins couldn't have looked more glamorous as she led the stars at the Emily in Paris season five Netflix Paris premiere at Le Grand Rex in Paris. The actress looked stunning in a plunging black Armani Privé gown with a dazzling diamond necklace and berry lip.
Actress Emily Blunt attends the SAG-AFTRA Foundation Conversations The Smashing Machine screening and conversation at SAG-AFTRA Foundation Robin Williams Center in New York City on 14 December. The star of The Smashing Machine rocked a black blazer with ankle boots and a sheer lace top.
SAG-AFTRA is the Screen Actors Guild American Federation of Television and Radio Artists, of which Emily is a member.
Actress Demi Moore mixed cosy with glitzy at the Landman season two FYC (For Your Consideration) event in LA. She teamed a furry top and cardigan with a floral embellished orange skirt and gold heels.
'The Fate of Ophelia' singer Taylor Swift was seen in New York City prior to her appearance on The Late Show with Stephen Colbert on 10 December, looking quietly cool in a mini skirt. The low-rise tartan number was paired with a furry coat and gorgeous Louboutin chocolate brown suede boots.
Freakier Friday star Jamie Lee Curtis oozed vampy chic at the world premiere of Ella McCay at El Capitan Theatre on 9 December. The actress rocked a ruched leather midi dress styled with killer heels and a clutch to match.
The Kardashians star Kylie Jenner attended the Los Angeles premiere of A24's Marty Supreme at the Samuel Goldwyn Theatre on 8 December, in support of her beau Timothée Chalamet, who plays the film's lead. The entrepreneur was seen donning a statement tangerine-hued latex dress by Chrome Hearts with coordinating heels.
Pop legend Kylie Minogue oozed cool as she posed outside the Apple Christmas tree at Battersea Power Station, which saw both her design and the public's winning iPad designs projected onto the 101-metre chimneys. The 'Spinning Around' singer looked gorgeous in a gold and black midi dress teamed with a faux fur shrug for the ultimate festive party look.
'Firework' singer Katy Perry rocked all black as she visited the Louvre Abu Dhabi ahead of the Formula 1 Abu Dhabi Grand Prix on 6 December. The popstar paired a slinky knit dress with peep-toe heels and a crossbody bag.
Kerry Washington was a vision in an edgy matching set with a corseted bodice and deconstructed skirt to attend The Hollywood Reporter's Annual Women In Entertainment Gala.
Her Zander Jacquard bustier top and Vionna Jacquard skirt boasted contrasting white underlay, which paired perfectly with her silver hoop earrings, Kurt Geiger 'Regent Point' stilettos and coordinating clutch bag. The Scandal actress never misses!
Jennifer Lopez donned this season's hottest trend, chocolate brown, for her appearance at The Hollywood Reporter's Annual Women In Entertainment Gala.
She opted for a business-approved skirt set complete with an oversized blazer, teamed with tan suede pumps. Her glossy hair was styled in loose waves and a statement metallic choker completed her chic attire.
The Testament of Anne Lee star Amanda Seyfried stunned at The Housemaid New York screening at 787 Seventh Ave on the eve of her 40th birthday on 2 December. The actress wore a bubblegum pink gown with ruching on the middle and dressed it up by styling her blonde locks in old Hollywood curls.
Song Sung Blue actress Kate Hudson oozed old money chic in silk at The Gotham Awards, an annual American film awards at Cipriani Wall Street in New York City on 1 December. The star rocked a halterneck gown with dramatic drop earrings and slicked her blonde hair behind her ears for extra va-va-voom.
Black Bag star Cate Blanchett oozed chic at The Fashion Awards at the Royal Albert Hall on 1 December. The actress rocked a Sarah Burton for Givenchy tuxedo dress styled with a grungy ear cuff.
The Best You Can actress Kyra Sedgwick attended the Los Angeles special screening of her new short film, Sweetwater, at the Academy Museum of Motion Pictures in LA on 1 December. She opted for a floaty crimson midi dress with a pleated skirt and paired it with strappy heels.
Singer Miley Cyrus, who wrote her single 'Dream as One' for Avatar: Fire and Ash, commanded attention for all the right reasons at the world premiere at the Dolby Theatre in Los Angeles on 1 December. The popstar and actress combined vampy vibes with classic red carpet chic in a black sequinned mermaid gown by Gucci.
Spanish-Swiss actress Oona Chaplin was also in attendance at the premiere of Disney's Avatar: Fire and Ash. She also seemed to receive the all-black dress memo as she dazzled in a strapless ruffled number.
Model and Goodwill ambassador of the UN's International Fund for Agricultural Development, Sabrina Elba, joined fashion designer Brunello Cucinelli for the unveiling of his 'A Visionary Dream You Can Touch' campaign to celebrate the holiday season at Harrods on 1 December. She proved she is a master at smart-casual as she paired white pants with a tan suede jacket, chocolate brown suede heels, and a coordinating shoulder bag.
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