LOS ANGELES, CA (Catholic Online) - "Unknown" stars Neeson as a botanist who awakens from a coma to find his wife claims she does not know him and that another man has taken his identity.

While "I Am Number Four" held youth appeal, and performed strongly in the No. 2 spot, "Unknown" was a rare No. 1 film that did most of its business among older crowds. According to Warner Bros., 54 percent of the movie's audience was 50 and over and 89 percent was 25 and over.

"I Am Number Four" stars Alex Pettyfer as a teenage alien refugee on Earth who develops superpowers to battle the evil invaders that destroyed his planet.

As to Liam Neeson, "He's the new man. He's stepped up to the plate. Put him in the right role and he's every man's action star," Dan Fellman, head of distribution at Warner Brothers says.

Two movies that opened the previous weekend held the next two spots in the top 10.

Disney's animated comedy, "Gnomeo & Juliet," was No. 3 with $19.4 million, finishing so closely to "I Am Number Four" that the two movies could change rankings when studios release final numbers. "Gnomeo & Juliet" raised its total to $50.4 million.

Adam Sandler and Jennifer Aniston's romance "Just Go With It," which had been No. 1 the previous weekend, fell to fourth place with $18.2 million. The Sony release lifted its total to $60.8 million.

The weekend's other new wide release, Martin Lawrence's comedy, "Big Mommas: Like Father, Like Son," was No. 5 with $17 million.

The top ten at the nation's box offices this long President's Day weekend looked like this:

1. "Unknown," $21.8 million
2. "I Am Number Four," $19.5 million
3. "Gnomeo & Juliet," $19.4 million
4. "Just Go With It," $18.2 million
5. "Big Mommas: Like Father, Like Son," $17 million
6. "Justin Bieber: Never Say Never," $13.6 million
7. "The King's Speech," $6.6 million
8. "The Roommate," $4.1 million
9. "The Eagle," $3.6 million
10. "No Strings Attached," $3.1 million