The new-look company, Premier PR incorporating McDonald & Rutter, has more than 50 staff. Keene said: 'Our combined resources and experience in UK and international publicity will be unmatched.'
Premier's personal clients include Jude Law and Kate Winslet. M&R's clients include BBC Films and Pathé.
M&R's 15 staff will move into Premier's Soho offices next month. Premier has 33 staff in London, five in LA.