Campbell was born in Westminster, London. She is the daughter of Scottish peer Colin Campbell, 7th Earl Cawdor and Lady Isabella Stanhope, a former British Vogue editor and daughter of William Stanhope, 11th Earl of Harrington. She has three younger siblings.

Her first job was for British Vogue and her second job was a Burberry campaign. Campbell appeared in a Stuart Weitzman advertisement with Kendall Jenner, Willow Smith, and Yang Mi. She has appeared in Louis Vuitton advertisements and runway shows. Campbell has been the face of “for her” by Narciso Rodriguez. She has also appeared in advertisements for Alexander McQueen, Bottega Veneta, Tory Burch, Carolina Herrera, G-Star Raw, David Yurman, Ralph Lauren, and Zara.

Campbell currently ranks as a “Top 50” model by models.com.