To give you a better answer, could you please specify the time period you're interested in? For example:
* What were some notable events in Vivien Leigh's life between the ages of 18 and 25?
* How did Vivien Leigh's acting career develop during her early adulthood?
* What were some significant relationships in Vivien Leigh's life during her early adulthood?
Once you provide more context, I can provide more specific and relevant information about Vivien Leigh's early adulthood.