The announcements will be made at a drinks reception at the Westminster office of Ellwood Atfield.
The finalists are:
Large agency (100+ employees): Golin, Instinctif, Lansons.
Medium agency (30 to 99 employees): Citypress, Forster, W.
Small agency (two to 29 employees): Dynamo, Man Bites Dog, Manifest.
In-house (corporate teams): Nationwide, Swiftkey.
Finalists were chosen following a paper judging session last month.
Each finalist faced a panel interview to decide who will win the gold, silver and bronze awards for their categories, with judges from PRWeek, the PRCA and the Chartered Institute of Personnel and Development (CIPD).
Visit the PRWeek website and the Twitter feed - @PRWeekUKnews – this evening to find out the results.