The 'Fab Four' feature alongside one another in a three-minute video that also stars actress Gillian Anderson and presenter Davina McCall.
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.
A picture of the Duke and Duchess of Sussex, 35 and 38 respectively, kissing on the lips has quickly gone viral on social media.
Meghan praised "amazing dad" Prince Harry and revealed an intimate pic of him admiring his infant son.
The Duke and Duchess of Sussex have been criticised for their carbon emissions during recent private jet trips.
Some have accused Camila Tominey of "white supremacy mentality" after she complained that of the 15 women featured on British Vogue's cover, "only five were white."
Jamil called Morgan "the thirstiest b***h alive" after he called out the "Good Place" actress and duchess on Twitter.
The duchess thought it would be "boastful" to appear on the cover herself, and instead chose "world-leading women" like Jane Fonda and Jameela Jamil to be on it.
A look back at Princess Diana's most iconic outfits. See the blue skirt suit she wore to announce her engagement to Prince Charles and her fairytale wedding dress.