Iron Man grossed $100.8 million, per studio estimates compiled Sunday by Exhibitor Relations Co., a number that makes the Robert Downey Jr. film second only to Spider-Man for comic book movie debuts.

Iron Man opened bigger than Batman Begins ($48.7 million), Superman Returns ($52.5 million), the first two X-Men movies and Spider-Man 2 ($88.2 million).

The estimate also doesn't include overseas ticket sales. If it did, it'd be nearly $100 million higher.

Among non-comic-book movie sequels, only the original Spider-Man topped $90 million in its opening weekend.

In all, by the close of business tonight, Iron Man is predicted to have taken in $104.3 million domestically and $201 million worldwide, or more than the entire global runs of Daredevil and Catwoman.