Conversation so far:
When did Christopher Reeve go to Cornell?
Christopher Reeve attended Cornell University, in Ithaca, New York from 1970-1974.
What did Christopher Reeve study?
Christopher Reeve double majored in English and music theory at Cornell.
Was Christopher Reeve successful?
Christopher Reeve was a talented all-around athlete and his Superman film grossed $300,218,018 worldwide.
Were Christopher Reeve's professors impressed by his success?
What did the Hesseltine's letter to Christopher Reeve say?
The letter expressed that Hesseltine had seen Christopher Reeve in A Month in the Country and wanted to represent him.
Did Christopher Reeve drop out of Cornell?
Christopher Reeve graduated from Cornell in 1974.

Question: What was the first thing he was cast in?
Self-contained rewrite: What was the first thing Christopher Reeve was cast in?