While it's nowhere near any domestic box office records so far, Man of Steel got off to a solid start at the box office last night, with an estimated $21 million. $9 million of that total came from general midnight screenings, while $12 million came from Wal-Mart's exclusive screening program.

It may be difficult to compare these numbers with other recent midnight figures, since the Wal-Mart screenings happened at 7 PM nationwide. Still, the $21 million tally was higher than the midnight screenings for The Dark Knight Rises ($18.5 million) and Marvel's The Avengers ($18.7 million) last year. 2011's Harry Potter and the Deathly Hallows - Part 2 still holds the midnight screening record with a massive $43.5 million, a figure that likely won't be bested until Star Wars: Episode VII or possibly The Avengers 2 in 2015.

RELATED: Superman II Celebrated by Fans on the 40th Anniversary as the Best Superman Movie

Man of Steel opens wide today in 4,207 theaters, the second-widest release ever for a non-sequel. Only 850 of those theaters will be screening this superhero adventure in 2D. Stay tuned throughout the weekend for more news about Man of Steel's opening weekend at the box office.