Question: When did the 1st mama mia come out?
Disambiguated questions and answers: question: When did the 1st mama mia stage show come out?
When did the 1st showing of the mama mia film come out?
answer: April 6, 1999
June 30, 2008
Natural Questions answer: July 18 , 2008 (from the Wikipedia article "Mamma Mia! (film)")