Pictured: Liam Neeson stars in "Unknown," which was number one at the box office this week.

The holiday weekend produced considerably weak numbers at the box office, but the Liam Neeson thriller Unknown still managed to bring in $21.7 million and position itself in first place.

The sci-fi thriller, I Am Number Four landed in second place with an unimpressive box office take of $19.4 million.

Disney’s animated feature Gnomeo and Juliet, based on William Shakespeare’s classic story Romeo and Juliet took in an additional $19.2 million for its second week in theaters. The pic, which was in third place for its debut held onto that position this week.

Just Go With It, the Adam Sandler-Jennifer Aniston romantic-comedy dropped from first place to fourth for its second week in theaters. It brought in an estimated $18.4 million in additional revenue, still nearly $20 mil away from its $80 mil budget.

Big Mommas: Like Father, Like Son is in fifth position in its first week out. It brought in an estimated $16.2 million between Friday and Monday, which is halfway to meeting its $32 mil budget.

Rounding out the top 10:

6.    Justin Bieber: Never Say Never $13.3 million

7.    The King’s Speech $6.5 million

8.    The Roommate $3.8 million

9.    The Eagle $3.6 million

10.  No Strings Attached $3 million