Chat show queen Oprah Winfrey is no stranger to high-profile interviews

Oprah Winfrey arrives at Windsor Castle ahead of the wedding of Prince Harry and Meghan Markle.

After walking away from the British royal family, the Duke and Duchess of Sussex have chosen a different kind of queen for their first major TV interview in the US.

Oprah Winfrey has all the power, money and influence of a monarch – only she amassed it through her successful career, rather than inheriting a throne.