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Warner Bros. and Legendary Pictures’ "The Dark Knight" has a real shot at crossing the $300 million mark at the domestic box office this weekend. If it does so, it would become the first film in history to hit that mark in its first 10 days.

Through Wednesday, "Dark Knight’s" cume was $222.1 million from 4,366 theaters after opening to a record-breaking $158.4 million last weekend. Film has also enjoyed record-breaking weekday numbers -- not counting holidays -- grossing $24.5 million on Monday, $20.9 million on Tuesday and $18.4 million on Wednesday.

"Dark Knight" would need to gross more than $62 million to reach $300 million this weekend, assuming it grosses $16 million on Thursday. Some box observers put the weekend number as high as $75 million-$80 million. The movie has become a phenomenon and is already destined to gross north of $400 million domestically.

It took "Pirates of the Caribbean: Dead Man’s Chest" 16 days to reach $300 million in domestic grosses and 17 days for "Star Wars -- Episode III: Revenge of the Sith." Last summer, "Spider-Man 3" hit the mark in 19 days.