
The high-street and online gambling brand has approached several agencies regarding the business. Pitches are understood to be taking place this week.
Alex O'Shaughnessy, head of product and marketing communications at the betting company, confirmed the review but declined to comment on specifics.
William Hill appointed Manchester agency BJL to create a TV push for its online casino gaming in 2008, following a pitch. The brand spent £5m on advertising in the UK in 2008, according to Nielsen.
In October, William Hill introduced its own in-house TV broadcasts, to be shown in its 2450 licensed betting offices. The service provides news, the latest odds and insights from sporting pundits.
In June, it appointed consultancy Wolff Olins on a short-term basis to overhaul its brand positioning following a pitch.
Last month William Hill teamed up with charity Breast Cancer Care to support its 'Pink Fridays' campaign.