Conversation so far:
When did Rodgers and Hammerstein start developing the show?
The first title given to the work was Away We Go! which opened for out-of-town-tryouts in New Haven's Shubert Theatre on March 11, 1943.
How were the reviews at the New Haven tryout?
the reviews were only fair.
What changes were made based on the reviews.?
two would prove significant: the addition of the show-stopping musical number, "Oklahoma!" and the decision to retitle the musical after that number.
Were any songs cut before Oklahoma! opened on broadway?
the addition of the show-stopping musical number, "Oklahoma!.
What was the casting process?
CANNOTANSWER.

Question: Were the leads known actors or new faces?
Self-contained rewrite: Were the leads known actors or new faces for Oklahoma!?