Dressed in a pale blue A-line dress with short sleeves, Middleton opted for no jewelry for the occasion, but paired her looked with black Prada strappy heels.
The mother of two, who is Patron of the museum, joined famous naturalist David Attenborough, as they opened the new Hintze Hall, which houses the “Wonder Bays” exhibit and features a new blue whale skeleton from 1891.
The event also marked the first time Middleton talked about her interest in Marine conservation.
“As someone who has been fortunate to experience scuba diving, something I love doing, and seeing the incredible marine life, I have come to care deeply about life under our waters and the conservation of our oceans,” Middleton said in her speech.
“Sir David Attenborough has famously talked about the fact that people will not protect what they don’t first care about, and will not care about what they have never experienced,” she continued. “This idea lies at the heart of this new Hintze Hall design. As I stand here tonight, I have every confidence that this spectacular display will go a long way not only to inspire a new generation but it will also encourage us all to think about and to care for our marine life.”