Conversation so far:
Where did they film?
Paris.
How was the weather during filming?
The weather had become unseasonably hot, and working in unair-conditioned hotel rooms was uncomfortable.
Where did they film?
California, where several interior scenes were filmed.
Did they like filming in California?
unhappy with the look of the scene as it had been shot by Minnelli, and at considerable expense.
When were they able to finish the score?
By mid-July, the composers had completed most of the score, but still were missing the title tune.
Is there any other interesting information?
The film title design uses the artwork of Sem's work from the Belle Epoque.
Is there any other interesting information?
the restaurant was recreated on a soundstage and the scene was reshot by director Charles Walters.
Why did Charles Walters do the reshoot?
Lerner was unhappy with the look of the scene as it had been shot by Minnelli, and at considerable expense.
Did Lerner make any changes to the script?
Lerner also expanded the focus on Gigi's relationship with her grandmother.

Question: Was it easy to come up with the title tune for the film?
Self-contained rewrite: Was Gigi (1958 film) title tune easy to come up with for the film?