The launch of the women's weekly was reported a week ago and is being backed by a £10m marketing spend.
NatMags is believed to have contacted Fallon, Clemmow Hornby Inge and HHCL/Red Cell about the task of launching the magazine.
Emap launched Closer with a £10m marketing spend, positioning the title as a celebrity magazine for 30- to 50-year-olds with real-life stories.
Closer has gone on to be a success for Emap, which this week said the magazine could surpass its youth-orientated celebrity bestseller Heat.
Heat had a July-December 2003 ABC of 566,731 while Closer reported 385,036.
Cosmopolitan, NatMags' flagship title, is also currently seeking its first ad agency in 32 years to market the brand to younger consumers. It has been working with Rise Communications to develop a strategy for the brand.
Saatchi & Saatchi launched the first UK edition in 1972.
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