At midnight this morning, Harry Potter and the Half-Blood Prince opened in theaters across the nation.

And even though it may have been far past the bedtime of many fans, audiences came out in droves.

The sixth installment in this franchise earned an estimated $20 million for its midnight screenings, beating the $18.5 million midnight runs by The Dark Knight and Star Wars: Episode III Revenge of the Sith.

In June, Transformers: Revenge of the Fallen grossed $16 million in midnight runs.

Translation: Harry Potter and the Half-Blood Prince is already a blockbuster.