The Duchess of Cambridge arrived in a risque cream off-the-shoulder dress for a night at the museum yesterday.
Kate joined guests from the arts and culture world at the Natural History Museum in London for the Art Fund Museum of the Year Award.
The Duchess, who made the short journey from Kensington Palace, the Cambridges' London home, wore a dress by Barbara Casasola, with strappy sandals and a sparkly clutch bag.
Kate, who is patron of the Natural History Museum, was greeted by its director, Sir Michael Dixon, and Dr Stephen Deuchar, director of the Art Fund.
A £100,000 award, the largest museum prize in the world, is given annually to one outstanding museum for showing exceptional imagination, innovation and achievement.
Among the artists in attendance were Cornelia Parker, Antony Gormley and Grayson Perry, who arrived in a purple, yellow and orange dress with flared sleeves, designed by Claire Cooper, one of his students at Central Saint Martins.
Kate spoke to representatives from the five museums shortlisted for this year's prize.
Nicky Wilson, of Jupiter Artland, West Lothian, said she was delighted to meet Kate, who told her Prince George has loved the museum. Ms Wilson added: "He comes here often."
The toddler, who will celebrate his third birthday later this month, has been previously spotted at the museum, admiring the dinosaurs.
Earlier, the Queen and Duke of Edinburgh were welcomed by workers at the Michelin tyre factory in Dundee. The Queen, who wore a turquoise Stewart Parvin coat with a silk dress and matching hat by Angela Kelly, also spoke with staff.
The Queen and Prince Philip additionally visited the Michelin Training School and workshop to meet apprentices, before touring the BNS Auto Technology Centre and tyre warehouse, where the Queen officially opened the facility.
Shaun Robertson (18) an apprentice from Dundee, said the meeting was "great".
Mark Jackson (47), a Michelin deputy steward, also from Dundee, added: "It was good to see someone like the Queen visit here. All the hard work we've done in Dundee... it's good to see someone like her come here.
"I think we've known for about a week she was coming, so it has been exciting. It's not the first time I've met someone from the Royal Family, but it was the first time I've met the Queen."