Harry Potter and the Deathly Hallows - Part 2 and The Avengers hold a joint record , alongside Avatar , to surpass $ 1 billion in 19 days .
Avatar crossed the $ 1 billion mark on the 19th day of its international release , making it the first film to reach this mark in only 19 days ( a record now matched by both Harry Potter and the Deathly Hallows – Part 2 in 2011 and The Avengers in 2012 ) .
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