Beyoncé backs 'courageous' Meghan Markle. (Courtesy)

Beyoncé has backed Meghan Markle in a powerful show of support for the Duchess of Sussex. The megastar is the latest big name to publicly praise the former actress for her bombshell interview with Oprah Winfrey. Beyoncé, 39, says she was inspired by Meghan after the tell-all chat, which aired in the US on Sunday night.

On Monday, tennis legend Serena Williams defended Meghan on social media, saying that she understands the "pain and cruelty" she has experienced. Beyoncé added he voice and called Meghan courageous for standing up for what she feels is right.

"Thank you Meghan for your courage and leadership," she wrote alongside a photo of the pair at the premiere for The Lion King in 2019.

"We are all strengthened and inspired by you."

They met at the premiere of The Lion King at Leicester Square in 2019.

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Meghan, 39, and her husband Harry laid bare their brief lives as a working royal couple in front of the world. The interview was watched by more than 11 million people in the UK on Monday night after 17 million Americans tuned in on Sunday night.

They alleged that a member of the family - not the Queen or Duke of Edinburgh - made a racist comment about their unborn son.

Oprah was left open-mouthed when the American - the first mixed-race member of the modern monarchy - said a fellow royal was worried about how dark their son Archie's skin tone might be before he was born.

Grand Slam star Serena spoke about her friend following the explosive interview.

Beyoncé shared this picture of herself with the Duchess of Sussex and the singer's husband Jay-Z (Photo/ PA)

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She wrote: "Meghan Markle, my selfless friend, lives her life - and leads by example - with empathy and compassion. She teaches me every day what is means to be truly noble. Her words illustrate the pain and cruelty she's experienced.

"First hand the sexism and racism institutions and the media use to vilify women and people of colour to minimise us, to break us down and demonise us. We must recognise our obligation to decry malicious, unfounded gossip.

"The mental health consequences of systematic oppression and victimisation are devastation, isolating and all too often lethal."