ZenithOptimedia, owned by Publicis Groupe, already runs media planning and buying for grooming and cosmetics firm L'Oreal in 15 European countries, including the UK.
Previously, the account was handled in-house by L'Oreal Media. Staff there will be joining ZenithOptimedia over the first quarter of 2008.
The company spends heavily on advertising its brands, which include L'Oreal Paris, Garnier, Maybelline and haircare brand Kerastase.
In the UK, where it also owns Body Shop, it is the fourth largest advertiser after Procter & Gamble, Unilever and the government. In 2006 it spent almost £120m on advertising.
Previously, the account was handled in-house by L'Oreal Media. Staff there will be joining ZenithOptimedia over the first quarter of 2008.
The company spends heavily on advertising its brands, which include L'Oreal Paris, Garnier, Maybelline and haircare brand Kerastase.
In the UK, where it also owns Body Shop, it is the fourth largest advertiser after Procter & Gamble, Unilever and the government. In 2006 it spent almost £120m on advertising.