Razorfish, which pitched against undisclosed agencies, will assist with strategy and the launch of new markets and products for both brands.
The agency already handles Unilever brands Axe, Lipton, Rexona and Signal.
In March, Unilever chief marketing officer Keith Weed said the company was looking to reduce the number of digital agencies it worked with.
This article was first published on campaignlive.co.uk
It is a significant move that brings the ability for Twitter users to easily leave their contact details within expanded tweets, called the Lead Generation Card, to express interest in what a brand is offering.