John Webster, the creator of Smash Martians, the Honey Monster and the Cresta bear, will be remembered at a service taking place (fittingly for a man who loved cricket) at 12.30pm in the Banqueting Suite of Lord's cricket ground.
The memorial will begin with a speech from Martin Boase, a founder of Boase Massimi Pollitt, the agency that Webster helped to create in 1968.
Tom Rodwell, an advertising man and the chairman of the London Community Cricket Association, will also talk about his memories of Webster.
Hugh Dennis, a comedian and actor and a personal friend of Webster's, will then read a speech written by Webster himself. He had intended to deliver it when he left DDB London last year.
Sir Alan Parker, Dave Trott, Andy Berlin, Jeremy Bullmore, Graham Rose, Jonny Mezaros and Winston Fletcher will be among those joining Webster's family at the service.
Webster died on 6 January after suffering a heart attack while jogging.
He was 71 years old.
Webster's legacy, page 24.