Her sister-in-law Meghan Markle's preference for a bateau neckline is well documented and it looks like Kate is taking tips from her preference of sleek tailoring and unfussy designs in a fitted tweed dress by Erdem, which she wore to open the new photography centre at the Victoria and Albert Museum in London last night.
She paired the dress with new, floral hooped statement earrings from the label and teamed the frock with deep purple accessories, including a waist cinching belt and plum velvet pumps from Jimmy Choo.
Kate and Will chose a mental health summit as their first royal engagement after the Duchess' maternity leave.
The royal had a tour of the centre's inaugural exhibition, "Collecting Photography: From Daguerreotype To Digital" which is an exploration of photography from the 19th century to the present day, drawing from the V&A's collection of a huge 800,000 photographs.
Kate studied art history at the University of St Andrews, where she met Prince William.
Middleton, who gave birth to Louis on April 23, has made appearances at events, such as the RAF centenary, Trooping the Colour, and Wimbledon, but she's only just officially returned back to work.
It's been said before that the mum of three has a keen interest in photography and has taken some of the official royal portraits of her children herself.
The power of support for mental health
This year's event will be crowned with a public lecture on mental health at the Ebenezer Presbyterian Church Hall at Osu in Accra. England, one in three employees in the United Kingdom have been formally diagnosed with a mental health condition at some point.