Campbell and Bartlett, who worked as art director and copywriter respectively for the agency, have been a team since 2000 with a portfolio including work for BT, BA, John Lewis and Ladbrokes.
Bo Hellberg, executive creative director of Interactive at OgilvyOne, said: "Good strong creative ideas are more important than ever in the online advertising world and I am delighted to be having these two energetic and highly experienced creatives join us."
If you have an opinion on this or any other issue raised on Brand Republic, join the debate in the .