LOS ANGELES -- "Iron Man" was pure gold at the box office.

The Marvel Comics adaptation, starring Robert Downey Jr. as the guy in the metal suit, hauled in $100.7 million during its opening weekend and $104.2 million since debuting Thursday night, the second-best premiere ever for a nonsequel, according to studio estimates yesterday.

Despite the huge "Iron Man" opening, Hollywood's overall business was down compared to the same weekend last year, when "Spider-Man 3" had a record debut of $151.1 million. The top 12 movies took in $154.1 million, off 15 percent from a year ago.

BOX OFFICE: Estimated ticket sales in millions for Friday through yesterday at U.S. and Canadian theaters, according to Media By Numbers LLC.

1. "Iron Man" $100.7.

2. "Made of Honor" $15.5.

3. "Baby Mama" $10.3.

4. "Forgetting Sarah Marshall" $6.1.

5. "Harold & Kumar Escape From Guantanamo Bay" $6.0.

6. "The Forbidden Kingdom" $4.2.

7. "Nim's Island" $2.8.

8. "Prom Night" $2.5.

9. "21" $2.1.

10. "88 Minutes" $1.6.