Conversation so far:
What is Discovery?
On October 13, 1961, she received a call from an agent who told her a producer was interested in working with her.
When she was told it was Alfred Hitchcock.
What was the movie about?
Hitchcock put Hedren through an extensive color screen test that lasted two days and cost $25,000, doing scenes from his previous films.
Was the movie popular?
was asked by Hitchcock to play the leading role in his upcoming film The Birds.

Question: What was her role in Discovery?
Self-contained rewrite: What was Tippi Hedren's role in Discovery (1961)?