In the non-executive advisor role she will chair a new IAB UK advertiser steering group to ensure advertisers are aware and updated on digital advertising.

Donnelly joined P&G as part of its graduate scheme, and worked in roles including corporate marketing director and UK head of marketing.

More recently she joined the Just Eat board as an independent non-executive director as well as serving on the board of the Advertising Standards Authority, where she is chair of the performance review committee.

Newly appointed IAB CEO, Jon Mew said: "Roisin is supremely qualified in this space to help us promote and simplify digital for advertisers. Not only has she managed some of the biggest budgets in marketing, she brings a wealth of experience in delivering world-class campaigns. She truly understands how to get the most from digital media."

Donnelly added: "I am delighted to be joining the IAB team and will help put the consumer and the advertiser at the centre of the IAB agenda. This is an exciting time for the IAB as digital advertising has reached record levels but we face some important challenges."