
The agency, 19% owned by Starcom MediaVest Group, already handled the retailer's £11m planning and buying for one-stage advertising - ads promoting clothing in supplements and women's magazines - and its pay-per-click search business. It has been awarded an additional £9m of business previously held by MediaCom North.
MediaCom North, owned by WPP, previously handled JD Williams' direct response TV planning and buying brief, as well as its two-stage advertising - inserts and press ads that promote mail order catalogues.
According to The Nielsen Company, JD Williams spent £16.5m on press advertising and £4m on TV advertising in the period 1 July 2008 to 30 June 2009.
In addition, it spent £23m on direct mail and £417,000 on door drops.
Both MediaVest Manchester and MediaCom North declined to comment.
A spokesman for JD Williams said: "We cannot confirm or deny at this point of time, because we are finalising our arrangements."
The mail order firm sells clothing under a number of brands, including JD Williams, Fifty Plus, Premier Man, Shapely Figures and Simply Be Mail Order.
As well as selling products via its mail order catalogues, JD Williams hosts an e-commerce site where consumers can shop for items.
JD Williams' creative account is held by DTV Group.
In January, the mail order group launched a DRTV campaign to promote its sister firm, Fashionworld. The ads aired on ITV, GMTV and UK Style.