Beatrice de Leon, 90, who with her late husband ran the Q Theater, a London stock operation, for more than 30 years, died Feb. 16 in the London suburb of Kew.
Before it closed in the 1950s, the theater had served as springboard for the careers of Dirk Bogarde, Vivien Leigh, Joan Collins and Margaret Lockwood. Others who appeared there as unknowns were Claude Rains, Sean Connery, Peggy Ashcroft, Richard Attenborough and Anthony Quayle.
The Q, where more than a thousand new works were staged, also was the tryout venue for the first plays of Terence Rattigan and William Douglas Home.
De Leon tried acting briefly, leaving it because of chronic stage fright. In tandem with theater management, she also taught acting for many years.
Survived by her daughter.