Activity will focus on the restaurant chain, which is owned by the private-equity company Rutland Partners, and its recent refurbishment. The delivery business is a separate entity owned by Yum! Brands.
A spokeswoman for Pizza Hut said it was "making initial inquiries into potential new agencies for next year". She added: "No body of work has been assigned yet. It’s in the very early stages."
This follows repeat denials to Campaign that a review was taking place.
This year, many of Pizza Hut’s restaurants have been revamped as part of a £60 million refurbishment programme that will introduce a new menu and design, such as open-plan kitchens.
Pizza Hut has previously worked with Abbott Mead Vickers BBDO but has not used the agency in the past