LOS ANGELES — "Swingers" co-stars Vince Vaughn and Jon Favreau buddied up for the weekend's top movie as "Couples Retreat" debuted with $35.3 million, while the micro-budgeted fright flick "Paranormal Activity" leaped into the top 10.

Shot for a reported $15,000, "Paranormal Activity" came in at No. 5 with $7.1 million as distributor Paramount expanded it into daylong release after two weeks of midnight-only screenings.

"Paranormal Activity" played in narrow release of just 160 cinemas, a fraction of the theater count for other top movies. It averaged a whopping $44,163 a theater, compared with $11,780 in 3,000 theaters for "Couples Retreat."

"Paranormal Activity" was acquired by former Paramount partner DreamWorks at 2007's Slamdance Film Festival with the idea that writer-director Oren Peli would reshoot it on a bigger budget.

But after audiences responded well to a test screening, Paramount decided to sneak "Paranormal Activity" out in a manner befitting its raw, independent roots. The studio began two weekends ago with midnight screenings in 13 cities, the movie building buzz online much as "The Blair Witch Project" did 10 years ago.

Sony's "Zombieland," the No. 1 movie the previous weekend, slipped to second place with $15 million, raising its total to $47.8 million.

Estimated ticket sales for Friday through Sunday at U.S. and Canadian theaters, according to Hollywood.com.

1. "Couples Retreat," $35.3 million.

2. "Zombieland," $15 million.

3. "Cloudy With a Chance of Meatballs," $12 million.

4. "Toy Story" and "Toy Story 2" in 3-D, $7.7 million.

5. "Paranormal Activity," $7.1 million.

6. "Surrogates," $4.1 million.

7. "The Invention of Lying," $3.4 million.

8. "Whip It," $2.8 million.

9. "Capitalism: A Love Story," $2.7 million.

10. "Fame," $2.6 million.

By The Associated Press