Royals rocking tartan: Kate Middleton, Meghan Markle, Duchess

The royal style set have looked prim and proper in plaid over the years, from Princess Anne and Zara Tindall to Princess Beatrice and the late Princess Diana

Duchess Kate's maternity style with baby No. 3, Gallery

Kate Middleton breaks away from suits in a Burberry jacket and jeans for Scotland visit

Kate Middleton wears plaid blazer to Shout volunteer event

HELLO! - Daily royal, celebrity, fashion, beauty & lifestyle news

Kate Middleton Style & Fashion: The Princess of Wales' Best Looks

HELLO! - Daily royal, celebrity, fashion, beauty & lifestyle news

Kate Middleton's Best Christmas Style Through the Years

Royals rocking tartan: Kate Middleton, Meghan Markle, Duchess Sophie and more looking perfect in plaid

Meghan Markle Wears Plaid Like Kate Middleton and Princess Diana - Royal Family in Plaid

Royals rocking tartan: Princess Kate, Meghan Markle, Duchess Sophie and more looking perfect in plaid

Times Meghan Markle Channeled Princess Diana

Kate Middleton and Meghan Markle Wore Similar Outfits in Scotland