Actress Cush Jumbo, whose screen roles have included TV's Torchwood and The Inbetweeners Movie, was honoured for the best play performance at the UK Theatre Awards.
The 28-year-old took the prize for her performance of Nora in Henrik Ibsen's A Doll's House at the Royal Exchange Theatre in Manchester.
Seasoned star Sian Phillips, aged 80, was rewarded for the best supporting role at the event - which celebrates regional productions throughout the UK - for her work at Sheffield's Crucible Studio Theatre in This Is My Family, which was also named best musical.
Another Crucible production won best play with Bull by Mike Bartlett, a 55-minute performance based around three employees who are waiting to learn which of them has been axed by their boss
A fourth Sheffield Theatre Productions work, The Full Monty, was named best touring production.
Janie Dee was honoured for her best performance in a musical for Hello, Dolly!, while Simon Callow collected the prize for his outstanding contribution to British theatre, which had been announced prior to today's ceremony at the Guildhall in London.
Julian Bird, chief executive of the Theatrical Management Association and the Society of London Theatre, said: "It has been a year of great achievement for theatre throughout the length and breadth of the UK, as demonstrated by the range of nominations celebrating skill and variety, both on and off stage."
Main winners 2013 UK Theatre Awards:
:: Best New Play - Bull by Mike Bartlett
:: Best Performance in a Play - Cush Jumbo for A Doll's House, Royal Exchange Theatre, Manchester
:: Best Supporting Performance - Sian Phillips for This Is My Family, Sheffield Theatres
:: Best Musical Production - This Is My Family, Sheffield Theatres
:: Best Performance in a Musical - Janie Dee for Hello, Dolly!, Curve, Leicester.
:: Best Show for Children and Young People - The Borrowers, Northern Stage; Mister Holgado , Unicorn Theatre
:: Best Director - Blanche McIntyre for The Seagull, Nuffield Theatre, Southampton/Derby Theatre
:: Best Touring Production - The Full Monty, Sheffield Theatres
:: Achievement in Dance - Wendy Houstoun for 50 Acts
:: Achievement in Opera - Welsh National Opera for Lulu & Lohengrin
:: Best Presentation of Touring Theatre - Scottish Opera
:: Most Welcoming Theatre - The Bike Shed Theatre
:: The Stage Award for Outstanding Contribution to British Theatre - Simon Callow