This just in: Warner Bros.' "The Dark Knight" breaks the $400 million mark at the domestic box office in just 18 days, smashing previous record-holder "Shrek 2," which took 43 days to reach $400 million.

"Dark Knight" grossed $6.2 million on Monday, putting it's cume at $400.1 million. Way to go, Batman.

The big question now: Will "Dark Knight" come in No. 1 this weekend for the fourth frame in a row? Or will Sony's Seth Rogen-James Franco stoner comedy "Pineapple Express" be the pic to topple the Batman sequel from the top perch? For a closer look at the race, click here.