Meghan Duchess of Sussex cradles baby bump during British Fashion Awards 2018

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Tuesday, December 11, 2018
This March 11, 2019 file photo shows Meghan, the Duchess of Sussex and Britain's Prince Harry leave after attending the Commonwealth Service at Westminster Abbey.
Prince Charles, talks with Meghan, the Duchess of Sussex as they attend the Commonwealth Service with other members of the Royal family at Westminster Abbey in London on March 11.
The Duke and Duchess of Sussex are given baby gifts by Canadian High Commissioner to the United Kingdom Janice Charett on March 11, 2019.
Appearing by surprise, pregnant Meghan Duchess of Sussex, is brought on stage by Britain's Prince Harry at the end of his speech at WE Day UK on March 6, 2019.
The Duke and Duchess of Sussex leave the residence of the the King of Morocco in Rabat on Feb. 25, 2019.
Britain's Meghan, Duchess of Sussex and Prince Harry the Duke of Sussex visit the Andalusian Gardens in Rabat, Morocco, 25 February 2019.
Prince Harry and Meghan, Duchess of Sussex, react after trying food as they visit a cooking school demonstration at the Villa des Ambassadors in Rabat, Morocco, Monday Feb. 25.
Prince Harry and Meghan stop to stroke horses in their stables during a visit to the Moroccan Royal Federation of Equestrian Sports in Rabat in Morocco on Feb. 25.
Prince Harry and Meghan, Duchess of Sussex, greet two small girls after a visit to an 'Education for All' boarding house in Asni Town in Morocco, Sunday, Feb. 24, 2019.
Britain's Prince Harry, Duke of Sussex,(C) and Britain's Meghan, Duchess of Sussex (R) meet guests during a reception as they attend the annual Endeavour Fund Awards on Feb. 7.
The Duke and Duchess of Sussex at the Hive, Wirral Youth Zone as part of a visit to Birkenhead.
Harry and Meghan visit Hamilton Square in Birkenhead to see a new sculpture marking the 100th anniversary of war poet Wilfred Owen's death on Jan. 14, 2019.
Prince William, Kate, Duchess of Cambridge, s Meghan Duchess of Sussex and Prince Harry, arrive at the Christmas day service at St Mary Magdalene Church on Dec. 25, 2018.
Meghan, Duchess of Sussex onstage during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London.
Meghan, Duchess of Sussex onstage during The Fashion Awards 2018 In Partnership With Swarovski at Royal Albert Hall on December 10, 2018 in London.
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.
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.
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.
Prince Harry and Meghan, Duchess of Sussex arrive in Dubbo, Australia, Wednesday, Oct. 17, 2018.
Britain's Prince Harry and Meghan, Duchess of Sussex wave from the balcony of the Grand Pacific Hotel in Suva, Fiji, Tuesday, Oct. 23, 2018.
Prince Harry and Meghan, Duchess of Sussex at the official dinner in Suva, Fiji, Tuesday, Oct. 23, 2018.
Prince William, Kate Duchess of Cambridge, Prince Harry and Meghan Duchess of Sussex take their seats ahead of the wedding of Princess Eugenie of York and Jack Brooksbank.
Prince Harry, Duke of Sussex and his new wife Britain's Meghan, Duchess of Sussex, attend the Prince of Wales's 70th Birthday Garden Party at Buckingham Palace in London on May 22.
Prince Harry and Meghan Markle in St George's Chapel at Windsor Castle for their wedding.
Britain's Prince Harry, Duke of Sussex kisses his wife Meghan, Duchess of Sussex as they leave from the West Door of St George's Chapel.
This photo released by Kensington Palace on Monday May 21, 2018, shows an official wedding photo of Britain's Prince Harry and Meghan Markle, on the East Terrace of Windsor Castle
This official wedding photo of Britain's Prince Harry and Meghan Markle shows the bridesmaids, the page boys and the couple's families, including Queen Elizabeth II.
Britain's Kate, Duchess of Cambridge, right, with Prince Harry and his fiancee Meghan Markle attend the first annual Royal Foundation Forum in London, Wednesday Feb. 28, 2018.
Britain's Prince William, Kate the Duchess of Cambridge, Meghan Markle and Britain's Prince Harry arrive for the Commonwealth Service at Westminster Abbey on March 12, 2018.
Britain's Prince Harry and his fiancee Meghan Markle pose for photographers during a photocall in the grounds of Kensington Palace in London, Monday Nov. 27, 2017.
Prince Harry (R) and Meghan Markle (L) attend a Wheelchair Tennis match during the Invictus Games 2017 at Nathan Philips Square on September 25, 2017 in Toronto, Canada.
Prince Harry (R) and Meghan Markle (L) attend a Wheelchair Tennis match during the Invictus Games 2017 at Nathan Philips Square on September 25, 2017 in Toronto, Canada.
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This March 11, 2019 file photo shows Meghan, the Duchess of Sussex and Britain's Prince Harry leave after attending the Commonwealth Service at Westminster Abbey.
Frank Augstein, File via AP

America's favorite pregnant royal made a surprise appearance at the British Fashion Awards on Monday night. Cradling her baby bump onstage, Meghan, Duchess of Sussex, wore a black one-shoulder Givenchy velvet gown and a huge smile.

The duchess showed up so she could honor Clare Waight Keller, the designer of her custom Givenchy wedding dress. Meghan presented her with the British Designer of the Year Womenswear Award.

"I've gotten to know Meghan on such a personal level, and you know, to have someone like that trust you in an incredible moment in their life, is something that is just the most unbelievable honor," Waight Keller said while accepting the award.

Meghan, who was known as an actress for her style well before she was a royal trendsetter, commented on the importance of fashion.

"As all of you in this room know, we have a deep connection to what we wear. Sometimes it's very personal and sometimes it's emotional," she said. "But for me, this connection is rooted in really being able to understand that it's about supporting and empowering each other, especially as women."

The duchess also donned gold bangles and black nail polish.

RELATED PHOTOS: Meghan's royal wedding dress

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Meghan Markle arrives for her wedding to Prince Harry at St George's Chapel, Windsor Castle on May 19, 2018 in Windsor, England.
Andrew Matthews/Getty Images

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ABC News contributed to this report.