Gillian Anderson’s polka dot M&S dress is a hard-working autumn staple - with a blazer and heels, it’s endlessly chic
Elegant and right on trend, we'll be wearing this £45 dress all season long
In her role as M&S’s Chief Compliments Officer, Gillian Anderson appeared on the British clothing brand's Instagram page to reveal that it’s been ‘empowering’ to be the CCO for the high street hero, and to share that she only says her iconic catchphrase ‘love that’ to someone who's clearly ‘put a lot of thought’ into their outfit.
Gillian could be seen wearing the satin polka dot flocked midi slip dress by M&S, paired with an oversized black blazer, which she wore draped over her shoulders for an effortlessly elegant and fluid finish.
The two pieces work to create a smart casual outfit that can transition from the office to date night with ease, and she finished off the look with a simple pair of black court pumps to keep to a sophisticated colour palette of black and deep brown. The result is beyond elegant, feeling muted and autumnal, as well as perfectly polished - what more could you want?
Shop Gillian Anderson's Timeless Look
Available in petite, regular and tall, Gillian's slip dress is sure to be a hard-working hero in any capsule wardrobe. With its scoop neckline, slender shoulder straps and flattering but relaxed cut, this is an elegant piece you can easily dress up or down.
There's also a skirt version of Gillian's dress, which would look amazing worn with chunky knitwear and ankle boots when the weather's chilly.
While Gillian's exact blazer is not available, M&S linked this one as a similar option in their Instagram post. With its tuxedo cut and contrasting satin lapels, it's certainly a striking choice when it comes to evening attire.
M&S shoppers call these heels 'really comfortable', 'very flattering', and 'elegant and classic'. They're available in standard and wide fits, with pointed toes giving them a sophisticated look.
A long-sleeve dress is always a good option in autumn, with this Boden one offering a similar look to Gillian's but with added arm coverage. Like her piece, it offers a balanced look that can be dressed up or down, with the polka dots adding charm.
A subtly curved waist brings a beautiful shape to this blazer from River Island, with its sharp lapels adding to the structured look. As with Gillian's blazer, this one also has contrasting satin lapels for a luxe finishing touch.
Offering a sleek look without compromising on comfort, these Clarks heels boast a foam inlay, which offers extra cushioning to 'absorb the impact of every step'. Plus, they come in half sizes and wide-fit options, too.
When it comes to autumn outfit ideas, Gillian's is a look you’ll want to have on hand throughout the season. Its sleek, timeless appeal means it can be worn for date night outfits, as well as the office.
It’s the satin finish of the dress that really gives it a luxe appeal, with the simple scoop neckline and relaxed, slip silhouette lending it a really wearable finish. Without the figure-hugging shape that so many evening pieces share, this is a flattering style that has the added bonus of comfort, and it’s a style you’ll be able to dress down easily, with a T-shirt layered underneath and a pair of ankle boots turning this capsule wardrobe staple into an elevated, everyday item.
Of course, there’s also the polka dot finish that makes this classic piece a timely buy, too. While checks and animal prints are dominating autumn/winter fashion trends for 2026, the polka dots we saw dominate fashion throughout spring and summer remain a staple pattern this season. Without being too bold or busy, polka dots are a print that balances personality and neutrality, especially when in a colourway like this.
