Meghan, 37, opted for a demure navy blue coat and matching dress by favourite label Givenchy, who designed her own wedding dress.
The duchess finished the look with an elegant navy hat by Noel Stewart, clutch bag and matching heels.
Meghan arrived with her husband Prince Harry at St George’s Chapel, Windsor Castle, and went straight inside without posing for photos so as not to detract attention from the bride and groom.
Meghan, 37, opted for a navy blue coat dress by go-to designer Givenchy as she arrived for the high-profile occasion with husband Prince Harry
The duchess finished the look with an elegant navy hat by Noel Stewart, clutch bag and matching heels
Once inside the Harry and Meghan took their seats in the pew beside the Duke and Duchess of Cambridge
The Duchess of Sussex chose Clare Waight Keller at Givenchy to create her wedding gown and has relied on the designer for several high profile appearances since.
Her outfit today consists of an elegant navy blue coat with chic button detailing – a perfect choice for the blustery autumn weather.
She is wearing the coat over a demure dress in the same shade – a popular monochromatic look often favoured by members of the royal family.
Her hat, by milliner Noel Stewart, is placed at a jaunty angle on the side of her head.
The Duchess of Sussex was the picture of elegance as she arrived at the chapel by car
The couple arrived by car to St George’s Chapel, Windsor Castle, and went straight inside without posing for photos so as not to detract attention from the bride on her big day
The Duchess of Sussex was radiant as she arrived for the service at St George’s Chapel today
The stylish royal finished the ensemble with a pair of navy suede shoes.
Once inside the Harry and Meghan took their seats in the pew beside the Duke and Duchess of Cambridge.
A radiant Meghan beamed as she read through the order of service. She was also seen leaning forward to speak to the guest in the pew in front.
The Duchess of Cambridge was seen chatting with Harry and Meghan as they waited for the service to begin
At one point the Duchess of Sussex was seen leaning forward to speak to the guest in the pew in front
Eugenie and tequila brand ambassador Jack Brooksbank will shortly say their vows in the gothic surrounds of 15th century St George’s Chapel, in front of an 850-strong congregation of celebrities, royals and VIP guests at Windsor Castle.
Model Pixie Geldof arrived at Windsor Castle wearing a salmon-pink dress – and she was joined by drummer George Barnett. The comedian Jimmy Carr and his wife Karoline Copping were also in attendance.
Naomi Campbell, Liv Tyler, Ricky Martin and Holly Valance are among the other high-profile members of the congregation.
The Duchess of Cambridge wowed in a pink Alexander McQueen dress as she arrived at Princess Eugenie’s wedding at St George’s Chapel with Prince William
Kate, 36, opted for a structured dress featuring puffed sleeves, which she teamed with a matching fascinator
The Duchess finished off her look with a co-ordinating clutch bag and matching heels