Newcomer "You're Next" set to challenge "Lee Daniels' The Butler" for top spot at weekend box office.

 (LIONSGATE) -  "You're Next," A low-budget but well-reviewed horror film will test the staying power of "Lee Daniels' The Butler" at the North American box office this weekend.

"You're Next" is director Adam Wingard's story about a family that is savagely attacked during a wedding anniversary celebration and stars Sharni Vinson, Joe Swanberg, A.J. Bowen, Nicholas Tucci and Barbara Crampton.

The last weeks of August are traditionally a slow time at the box office, and no film this coming weekend expected to earn more than 15 million dollars.

Also in the running is British director Edgar Wright's "The World's End," about childhood friends who become mankind's only hope for survival after a trip to the pub. The film is seen as the cap on a trilogy that includes 2004's "Shaun of the Dead," and "Hot Fuzz" from 2007 and reunites the director with the stars of those films, Simon Pegg and Nick Frost.

Another new release is "The Mortal Instruments: City of Bones," a screen adaptation of the first book from the best-selling young adult series of the same name. The film, which stars Lily Collins as Clary, a seemingly ordinary teenager who discovers she's the descendant of a secret organization of half angel warriors engaged in an ancient war to protect the world from demons.

Following up the pack is the Jennifer Aniston comedy "We're the Millers," which earned the No. 2 slot with $17.8 million in its second weekend.

Writer/director Woody Allen's "Blue Jasmine," drawing rave reviews for Cate Blanchett, will widen its release to 1,200 theaters.