Rosamund Pike and Laura Carmichael dazzle as A United Kingdom opens the London Film Festival

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The stars of A United Kingdom descended on the glittering red carpet on Wednesday evening as the hotly-anticipated movie premiere opened the BFI London Film Festival.

Gone Girl star Rosamund Pike led the way in a gorgeous white gown with an asymmetric strap and a unique feathered detail across her middle.

Rosamund Pike
Rosamund Pike at the premiere for A United Kingdom, during the opening gala of the BFI London Film Festival (Joel Ryan AP/PA Images)

Downton Abbey's Laura Carmichael didn't look too far away from her TV alter-ego Lady Edith in an elegant baby blue vintage dress.

They were joined by co-star and Selma actor David Oyelowo and his wife Jessica, who upstaged him in her beautiful, glittering black dress.

Laura Carmichael
Laura Carmichael (Joel Ryan AP/PA Images)

David and Jessica Oyelowo
David and Jessica Oyelowo (Joel Ryan AP/PA Images)

Tom Felton
Tom Felton (Joel Ryan AP/PA Images)

Other stars from the movie on the red carpet at London's Leicester Square were Tom Felton and Charlotte Hope and the film's director Amma Asante, who is famed for 2013 movie Belle.

The film tells the love story of Seretse Khama, King of Bechuanaland, now modern Botswana, and Ruth Williams, the London office worker he married in 1948 in the face of opposition from their families and governments.

The premiere marked the opening night gala of the annual London Film Festival, which will run until October 16.

Amma Asante
Amma Asante (Joel Ryan AP/PA Images)

Charlotte Hope
Charlotte Hope (Joel Ryan AP/PA Images)