Kate Middleton wore £780 emerald green sequin dress by Needle & Thread for King Charles’ 75th birthday party

Kate Middleton oozed glamor in a festive emerald green sequin dress for King Charles’ glittering 75th birthday party.

The Princess of Wales, 41, was spotted leaving Clarence House with her husband, the Prince of Wales, around midnight last night.

The royal looked elegant in an emerald green Needle & Thread Alicia sequin dress made from recycled polyester.

The stunning floor-length ensemble, which retails for £780, features long sleeves and a high neck.

The princess also owns the beautiful red dress, which she wore in 2020 during an Investment Summit at Buckingham Palace.

The mother-of-three styled her long brunette locks in a straight center parting, while her glamorous make-up enhanced her flawless complexion.

Kate got into the party spirit and seemed to add even more sparkle with diamond earrings.

While Prince William, also 41, looked dapper in a white shirt and jacket as he drove out of the King’s residence in London.

They were joined at the King’s birthday celebration by his niece Princess Beatrice, Princess Margaret’s daughter Lady Sarah Chatto and the monarch’s niece Zara Tindall and her husband Mike.

Zara, 42, looks effortlessly elegant in Australian designer Rebecca Vallance’s £640 Eva dress, featuring a fitted silhouette and dazzling pearl embellishment.

Charles celebrated his 75th birthday with a gun salute and sing-along at a food waste project, followed by a reception for the NHS on Tuesday.

A royal 41-gun salute in Green Park, central London, a 62-gun salute at the Tower of London and a 21-gun salute in Edinburgh all marked Charles’ milestone on Tuesday.

The 41-year-old Princess of Wales was spotted leaving Clarence House around midnight last night with her husband, the Prince of Wales

The Aurelia Long Sleeve Dress in Emerald Green is a dress from last season and is therefore currently on sale for £490

The royal looked elegant in an emerald green Needle & Thread Alicia sequin dress made from recycled polyester

The mother-of-three styled her long brunette locks in a straight center parting, while her glamorous make-up enhanced her flawless complexion

It comes as Kate has released a slick video to promote her keynote speech at the Shaping Us symposium, which takes place today.

Kate, 41, who will be speaking at the event taking place at The Design Museum in London, can be seen gliding towards the entrance to the stage as her Gianvito Rossi leans dramatically against the floor.

“Tomorrow we’re hosting the #ShapingUs National Symposium,” last night’s video caption read.

“For the first time, we will bring together interdisciplinary leaders, child and adult specialists and global thinkers to reflect on how we grow, think and behave across the lifespan to build resilience for the future.”

Last night, Kate was also spotted at a reception for the symposium, where she had the chance to prepare for her keynote speech.

Footage from yesterday shows the princess rehearsing on stage as she prepares for the big day.

The princess also owns the beautiful red dress, which she wore in 2020 during an Investment Summit at Buckingham Palace

She also grinned during a chat with guests including Justin Welby – the Archbishop of Canterbury – yesterday.

In addition to hearing from the Princess of Wales, the symposium will also feature lectures from Professor Jack Shonkoff, director of the Center on the Developing Child at Harvard; Sara Rajeswaran, Chief of Staff at Aviva and Professor Robert Waldinger, Director of the Harvard Study of Adult Development.

Fearne Cotton will also host the event.

In the afternoon, attendees will also take part in a series of workshops to explore what action can be taken at every level to protect and strengthen skills for current and future generations across all disciplines and sectors.

The multimedia campaign is part of a major campaign by the Royal Foundation Center for Early Childhood, founded by the Princess in June 2021, to raise awareness of how our early years shape our lives.

It will take at least five years and has been described in the past by a Kensington Palace spokesperson as the princess’s “life’s work.”