As expected, ‘Green Lantern’ was the number one movie at the box office this weekend, taking in a slightly underwhelming $52.7 million, according to weekend estimates.

That number marks the lowest opening for a superhero movie this summer, behind ‘Thor’ ($66 million) ‘X-Men: First Class’ ($56 million).

This weekend’s other new release, the Jim Carrey vehicle ‘Mr. Popper’s Penguins,’ also underwhelmed, earning just $18.2 million for a third-place finish. Last week’s champ, ‘Super 8,’ came in second, with a steady $21.3 million.

Rounding out the top five were ‘X-Men: First Class,’ with $11.5 mil, and ‘The Hangover Part II,’ with $9.5 million.

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