Article continues below advertisementMeghan Markle and Kate Middleton are continuing to channel Princess Diana from beyond the grave through one defining wardrobe look, with insiders telling OK! the tragic late royal's denim styling remains a powerful influence on the modern monarchy.Meghan, 44, the Duchess of Sussex, and Kate, also 44, the Princess of Wales, have both repeatedly drawn on Diana's signature off-duty uniform - a white shirt, denim jeans and a structured belt - a look the late princess, who died at age 36 in 1997 in a Paris car crash, made synonymous with understated elegance.