A trustee at the Hall for Cornwall has been named as one of the 100 most powerful women in the UK.
Rosemary Squire has been recognised for her influence and importance today by being placed at 16th on the list.
Mrs Squire founded the Ambassador Theatre Group (ATG) in 1992 - along with Howard Panter - looking after the productions, marketing and staging as well as 39 venues nationally.
ATG is an internationally recognised award-winning theatre producer with co-productions in New York, across North America, Europe, Asia and Australia and is a leader in theatre ticketing services through ATG Tickets.
Julien Boast, director at Hall for Cornwall, said: "This is not only a wonderful recognition for Rosemary and all that she does but it also shows the importance of theatre.
"To be placed so highly in the rankings with royalty, government ministers and bankers, puts theatre at the heart of our culture and proves that it is genuinely valued in the UK today". In 2005 Mrs Squire was elected president of the Society of London Theatre, only the second female president in the organisation's 100 year history.
She then served a further three years as vice president. In 2006, Rosemary won the CBI Real Business First Women Award for Tourism and Leisure, and in 2007 was awarded an OBE for Services to Theatre.