On July 18, 2008, the second installment of The Dark Knight Triology was released and was an instant success. So successful, in fact, that it had (at the time) the highest grossing opening weekend of any movie in history. The film earned $158 million at the box office -- that's over 22 million movie tickets sold in one weekend!
In total, The Dark Knight earned a jaw-dropping $1 billion worldwide, and was only the fourth film in history to gross more than $1 billion.
Tragically, one of the film's stars, Heath Ledger (who played the Joker), died from an accidental prescription-drug overdose six months prior to its release. His performance received nearly unanimous praise, and lead to his winning an Academy Award for Best Supporting Actor for the role.
Almost 2 years to the date later the third and final film of the trilogy, The Dark Knight Rises, premiered and equally blew through a number of records. It, too, earned $1 billion making it the fifth highest grossing superhero film of all time.