Rogers, in the role for three years, steered the world's biggest advertising company through the COVID-19 pandemic and the start of its new strategy to help clients develop e-commerce and transform their operations digitally.

"It is expected that Joanne will join WPP in the first half of 2023," the British listed company said. "To ensure a smooth transition, John will remain available until later next year."

WPP said Rogers would pursue "broader executive opportunities" elsewhere.

Wilson joined Britvic in September 2019 from Dunnhumby, the data arm of British retailer Tesco.

She will move to a company that employs 109,000 people in 110 countries. While it has made good progress in adopting a new strategy to deepen its ties with customers, it has been hit by fears of an advertising slowdown at major tech companies.

(Reporting by Kate Holton; editing by James Davey and Paul Sandle)