Duchess Meghan shows off her growing baby bump at surprise appearance at 2018 Fashion Awards

Monday's 2018 Fashion Awards was filled with one big name after another -- Kendall Jenner, Penelope Cruz, Naomi Watts, to name a few -- but the audience got the surprise of a lifetime when the Duchess of Sussex appeared on stage at the Royal Albert Hall to present Givenchy's Clare Waight Keller with the British Womenswear Designer of the Year award.

Keller, who has been with the fashion powerhouse since 2017, has been behind many of the royal's most iconic looks, including her wedding dress.

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Duchess Meghan makes surprise appearance at Fashion Awards
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Duchess Meghan makes surprise appearance at Fashion Awards
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex and Rosamund Pike on stage during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by John Phillips/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex on stage during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Tristan Fewings/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Clare Waight Keller is watched by Meghan, Duchess of Sussex and Rosamund Pike as she speaks on stage after receiving the award for British Designer of the Year Womenswear Award for Givenchy during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Jeff Spicer/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex on stage during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Jeff Spicer/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex and Rosamund Pike present the award for British Designer of the Year Womenswear Award to Clare Waight Keller for Givenchy during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Jeff Spicer/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Clare Waight Keller is watched by Meghan, Duchess of Sussex and Rosamund Pike as she speaks on stage after receiving the award for British Designer of the Year Womenswear Award for Givenchy during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Jeff Spicer/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex and Rosamund Pike present the award for British Designer of the Year Womenswear Award to Clare Waight Keller for Givenchy during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Jeff Spicer/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex and Rosamund Pike on stage to present the British Designer of the Year Womenswear Award during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Joe Maher/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex presents the award for British Designer of the Year Womenswear Award to Clare Waight Keller for Givenchy during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Jeff Spicer/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex on stage during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Jeff Spicer/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex presents the award for British Designer of the Year Womenswear Award to Clare Waight Keller for Givenchy during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Tristan Fewings/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex and Rosamund Pike on stage during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Jeff Spicer/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex on stage during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Joe Maher/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex on stage during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Tristan Fewings/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex on stage during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Tristan Fewings/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex on stage during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Tristan Fewings/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex on stage during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Jeff Spicer/BFC/Getty Images)
LONDON, ENGLAND - DECEMBER 10: Meghan, Duchess of Sussex on stage during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London, England. (Photo by Jeff Spicer/BFC/Getty Images)
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"To have someone like that trust you in an incredible moment in their life is something that is just the most unbelievable honor," Keller said while accepting her award. "I can’t thank you enough because it was the most beautiful moment.”

Unsurprisingly Givenchy was also behind the dress Meghan donned to surprise and honor Keller. The 37-year-old royal took the stage in a black form-fitting one shoulder gown, which aptly showed off the duchess' growing baby bump. Meghan opted for a sleek and simple bun, a gold cuff by Pippa Small and Tamara Mellon heels, as well as some protocol-pushing dark nail polish to accessorize. 

For the best looks at the annual awards show, scroll through below. 

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Best looks at the Fashion Awards 2018
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Best looks at the Fashion Awards 2018
Lady Amelia Windsor in Carolina Herrera 
Rosamund Pike in Givenchy Haute Couture
Kendall Jenner in Julien Macdonald
Rosie Huntington-Whiteley in Givenchy
Winnie Harlow in a silver beaded gown. 
Kate Moss in a one-shouldered emerald gown. 
Jourdan Dunn in 16Arlington
Victoria Beckham in Victoria Beckham
Naomi Watts in Richard Quinn
Kaia Gerber in Alexander McQueen
Penelope Cruz in Chanel
Alek Wek in custom Swarovski by Emilia Wickstead
Uma Thurman in a black velvet and jeweled gown.
Fran Summers in Valentino
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