Mandy Moore rocks the same Preen dress as Duchess Kate: Who wore it best?

She's got the royal seal of approval!

Mandy Moore hit the red carpet on Wednesday night in a gorgeous blue dress. But wait, doesn't it look familiar? If you recall, that's the same A-line Preen dress that Duchess Kate wore last year during her Royal Tour of Canada.

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Mandy Moore out and about
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Mandy Moore out and about
LOS ANGELES, CA - JUNE 07: Actress Mandy Moore attends the 'This Is Us' FYC screening and panel at The Cinerama Dome on June 7, 2017 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - JUNE 07: Actress Mandy Moore, shoe detail, attends the 'This Is Us' FYC screening and panel at The Cinerama Dome on June 7, 2017 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - JUNE 07: Actress Mandy Moore attends the 'This Is Us' FYC screening and panel at The Cinerama Dome on June 7, 2017 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - NOVEMBER 15: Actress Mandy Moore attends Prada Presents 'Past Forward' by David O. Russell premiere at Hauser Wirth & Schimmel on November 15, 2016 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images)
LOS ANGELES - NOVEMBER 15: Mandy Moore and Matthew Broderick chat with James Corden during 'The Late Late Show with James Corden,' Tuesday, November 15, 2016 (12:35 PM-1:37 AM ET/PT) On The CBS Television Network. (Photo by Terence Patrick/CBS via Getty Images)
BEVERLY HILLS, CA - NOVEMBER 07: Mandy Moore attends the Holiday Of The Heart Gala at the Beverly Wilshire Four Seasons Hotel on November 7, 2016 in Beverly Hills, California. (Photo by Jerritt Clark/Getty Images)
LOS ANGELES, CA - NOVEMBER 03: Actress Mandy Moore attends the NBC and Vanity Fair toast to the 2016-2017 TV season at NeueHouse Hollywood on November 2, 2016 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
PACIFIC PALISADES, CA - OCTOBER 15: Mandy Moore arrives at the 7th Annual Veuve Clicquot Polo Classic at Will Rogers State Historic Park on October 15, 2016 in Pacific Palisades, California. (Photo by Steve Granitz/WireImage)
PACIFIC PALISADES, CA - OCTOBER 15: Mandy Moore arrives at the 7th Annual Veuve Clicquot Polo Classic at Will Rogers State Historic Park on October 15, 2016 in Pacific Palisades, California. (Photo by Steve Granitz/WireImage)
THIS IS US -- 'The Best Washing Machine in the Whole World ' Episode 107 -- Pictured: (l-r) Milo Ventimiglia as Jack, Mandy Moore as Rebecca -- (Photo by: Ron Batzdorff/NBC/NBCU Photo Bank via Getty Images)
THIS IS US -- 'The Best Washing Machine in the Whole World ' Episode 107 -- Pictured: Mandy Moore as Rebecca -- (Photo by: Ron Batzdorff/NBC/NBCU Photo Bank via Getty Images)
WATCH WHAT HAPPENS LIVE -- Pictured (l-r): Nile Rodgers and Mandy Moore -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
NEW YORK, NY - SEPTEMBER 27: Actress Mandy Moore is seen on September 27, 2016 in New York City. (Photo by Patricia Schlein/Star Max/GC Images)
NEW YORK, NY - SEPTEMBER 27: Singer/ actress Mandy Moore attends the Hearst launch of HearstLive, a multimedia news installation, at Hearst Tower on September 27, 2016 in New York City. (Photo by Matthew Eisman/Getty Images)
TODAY -- Pictured: (l-r) Anchors Hoda Kotb and Kathie Lee Gifford with Mandy Moore on Tuesday, September 27, 2016 -- (Photo by: Peter Kramer/NBC/NBCU Photo Bank via Getty Images)
LOS ANGELES, CA - SEPTEMBER 18: Mandy Moore arrives at the 68th Annual Primetime Emmy Awards at Microsoft Theater on September 18, 2016 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
Actress Mandy Moore attends The screening of NBC 'This Is Us' at The Tenth Annual PaleyFest Fall TV Previews presented by The Paley Center For Media, in Beverly Hills, California, on September 13, 2016. / AFP / VALERIE MACON (Photo credit should read VALERIE MACON/AFP/Getty Images)
THE TONIGHT SHOW STARRING JIMMY FALLON -- Episode 0530 -- Pictured: Actress Mandy Moore during an interview on September 9, 2016 -- (Photo by: Andrew Lipovsky/NBC/NBCU Photo Bank via Getty Images)
THIS IS US -- 'The Game Plan' Episode 105 -- Pictured: (l-r) Mandy Moore as Rebecca, Milo Ventimiglia as Jack -- (Photo by: Ron Batzdorff/NBC/NBCU Photo Bank via Getty Images)
BEVERLY HILLS, CA - AUGUST 04: Actress Mandy Moore arrives at the Hollywood Foreign Press Association's Grants Banquet at the Beverly Wilshire Four Seasons Hotel on August 4, 2016 in Beverly Hills, California. (Photo by JB Lacroix/WireImage)
THIS IS US -- 'The Pool' Episode 104 -- Pictured: (l-r) Mandy Moore as Rebecca, Lonnie Chavis as 8 year old Randall -- (Photo by: Ron Batzdorff/NBC/NBCU Photo Bank via Getty Images)
BEVERLY HILLS, CA - AUGUST 02: Mandy Moore attends the 2016 Summer TCA Tour - NBCUniversal Press Tour on August 2, 2016 in Beverly Hills, California. (Photo by JB Lacroix/WireImage)
NBCUNIVERSAL EVENTS -- NBCUniversal Summer Press Tour, August 2, 2016 -- Party at BOA Steakhouse -- Pictured: (l-r) Mandy Moore, Milo Ventimiglia, 'This is Us' -- (Photo by: Mark Davis/NBCUniversal/NBCU Photo Bank via Getty Images)
UNIVERSAL CITY, CA - MAY 26: Actress Mandy Moore arrives for The Red Nose Day Special On NBC at Alfred Hitchcock Theater at Universal Studios on May 26, 2016 in Universal City, California. (Photo by Albert L. Ortega/Getty Images)
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At the FYC event for her NBC show "This Is Us" on Wednesday, Moore, 33, added a touch of her own California-cool style to the already glamorous dress. The actress gave the outfit a more relaxed feel by wearing in a more off-the-shoulder style.

She wore her shoulder-length tresses down in loose curls with barely any makeup on. A pair of silver strappy sandals adorned her perfectly polished feet, while she held a bedazzled clutch.

Meanwhile, Kate opted for a more formal style in her red dress at a reception at Canada's Government House back in September 2016. The 35-year-old royal wore her brunette tresses in an elegant updo while accessorizing with a clutch and some pumps in the same hue.

And not surprisingly, Kate's choice of color was on purpose -- the bright red hue paid homage to Canada's national color. See her ensemble below:

14 PHOTOS
Duchess Kate in Preen for formal reception in Canada
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Duchess Kate in Preen for formal reception in Canada
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
Britain's Catherine, Duchess of Cambridge, attends a reception at Government House in Victoria, British Columbia, Canada, September 26, 2016. REUTERS/Chris Wattie
Britain's Catherine, Duchess of Cambridge, leaves at the conclusion of a ceremony at Government House in Victoria, British Columbia, Canada, September 26, 2016. REUTERS/Chris Wattie
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Prince William, Duke of Cambridge attends a 'Black Rod Ceremony' during a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
VICTORIA, BC - SEPTEMBER 26: Catherine, Duchess of Cambridge attends a reception at Government House on Day 3 of a Royal Tour of Canada on September 27, 2016 in Victoria, Canada. Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince George and Princess Charlotte are visiting Canada as part of an eight day visit to the country taking in areas such as Bella Bella, Whitehorse and Kelowna (Photo by Chris Jackson/Getty Images)
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We think both ladies look equally as gorgeous -- who do you think wore it best?!

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