Morrison will oversee the agency’s events and experiential team, primarily working on clients John Lewis, Cadbury and Under Armour.
She will work alongside board director Sian Baker and joint managing director Jessica Hargreaves.
At RPM, Morrison worked with clients including M&S, Diagio and Coca-Cola. She also oversaw the launch of E.ON’s first shop back on the high street in 20 years.
Hargreaves said: "Kate’s appointment comes at an exciting time for PrettyGreen and we are delighted to have her on board. Her extensive skill set and knowledge will enable her to play an integral role in helping to further grow the business’ event portfolio."
Morrison added: "The chance to head up a young, fun and creative team offered me an opportunity too good to pass up. I can’t wait to help build on the events offering."
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