The star-packed thriller "Contagion" racked up $23.1 million in its first week in release, easily putting it on top of this weekend's box-office.

"The Help", which had been no. 1 for the past three weeks, fell to second place with an $8.7 million dollar take, follwed by "Warrior" which finished third with $5.6 million in its first week.

Here's the top ten:

"Contagion" ($23.1 million)
"The Help" ($8.7 million)
"Warrior" ($5.3 million)
"The Debt" ($4.9 million)
"Colombiana" ($4 million)
"Rise of the Planet of the Apes" ($3.9 million)
"Shark Night 3D" ($3.5 million)
"Apollo 18" ($2.9 million)
"Our Idiot Brother" ($2.8 million)
"Spy Kids: All the Time in the World" ($2.5 million)