The dual appointment becomes live in June, when the previous network, McCann-Erickson, stops working on the account. The former roster agency, Roose, will lose the Calgon, Finish and Vanish brands to Euro RSCG, but will work on the account until the end of this year.
The UK billings for the account are £40 million. Reckitt said its existing media buying and planning arrangements were not affected. OMD UK and Carat share the business in the UK.
Reckitt's executive vice-president of category development, Elio Leoni Sceti, said both agency networks had the consumer and strategic insights to contribute to the growth of the company.
"Our strategy of continuous innovation supported by excellent consumer communication has served us well and our creative agency relationships play an important role in this success. Equity advertising is a major engine of our growth and we believe Euro RSCG and JWT will contribute greatly to this."
The pitch came following McCann's resignation of the global Reckitt account last November. McCann's parent company Interpublic's True North acquisition resulted in a conflict between McCann's Reckitt business and FCB's SC Johnson account, which includes cleaning product brands such as Toilet Duck, Pledge and Mr Muscle.