The latest DC Comics mega movie pulled in $52.7 dollars domestically, easily taking the weekend title.
The film, starring Ryan Reynolds, pulled in another $17 million.
Overall it's considered a solid but unremarkable opening compared to other comic book films.
Last week's top film "Super 8" slipped to number two, pulling in just over $21 million.
The Jim Carrey film "Mr. Popper's Penguins" debuted at third place.
Final domestic figures will be released Monday.
- "Green Lantern," $52.7 million ($17 million international).
- "Super 8," $21.3 million.
- "Mr. Popper's Penguins," $18.2 million.
- "X-Men: First Class," $11.5 million.
- "The Hangover Part II," $9.6 million ($21.4 million international).
- "Kung Fu Panda 2," $8.7 million ($52.5 million).
- "Bridesmaids," $7.5 million ($7.3 million international).
- "Pirates of the Caribbean: On Stranger Tides," $6.2 million ($25.9 million international).
- "Midnight in Paris," $5.2 million.
- "Judy Moody and the NOT Bummer Summer," $2.2 million.
The Associated Press contributed to this report.
