"We are calling out what can only be described as outdated, colonial undertones to some of these stories," the letter reads.
Thomas Markle is speaking out after the duchess and Prince Harry took legal action against the newspaper which published her private letter.
The British talk show host launched a tirade against the royal couple's statement against the press.
DeGeneres said she's "proud to call Meghan and Harry friends" after the couple stood up to negative and invasive media attention.
The royal couple is citing breach of privacy after a British newspaper published Meghan's private letter to father Thomas Markle.