Scott Brownrigg has been tasked with putting together a detailed design of the new centre, which will be located close to the Resort’s existing hotel and conference facilities.
The state-of-the-art auditorium, exhibition hall and associated facilities will have capacity for around 4,000 delegates, making it the largest facility of its kind in Wales and the south west of England.
The convention centre is expected to be completed by 2018 and has received funding support from the Welsh Government.
Sir Terry Matthews, chairman of the Celtic Manor Resort, said: "We’ve made no secret of our desire to expand our successful business at the Celtic Manor and build on our status as the number one conference hotel in the UK."
Neil MacOmish, group board director at Scott Brownrigg added: "We are delighted to have been selected to design Wales’ International Convention Centre, which is designed to be both memorable and create a lasting contribution to the special place, context and environment, not just of the Celtic Manor Resort but of this part of Wales."