The agency will oversee digital and social media activity in the UK and US.
Unilever is currently reviewing its £3 billion global media account, which is shared between Mindshare, Initiative and PHD. Beauty Seen remains Toni & Guy’s lead PR agency.
In April last year, Unilever and Razorfish created a YouTube channel called All Things Hair. It features hair-styling tutorials from video bloggers, such as Zoella and Tanya Burr, to promote brands including Toni & Guy, Dove and VO5.