Conversation so far:
Where did they film the movie Gigi?
Most of film, Gigi was filmed in Paris, and a small part was filmed in California.
How was the weather during the filming of Gigi?
In Paris, the weather had become unseasonably hot, and working in hotel rooms without air-conditioning was uncomfortable.

Question: Where did they film?
Self-contained rewrite: Where did Arthur Freed and Alan Jay Lerner film the movie Gigi?