Lee Daniels' The Butler has served up a second week at the top of the U.S. box office.

The biopic claimed $17 million (£11.3 million) in its second weekend on release, edging out Jennifer Aniston's comedy We're the Millers.

Both films beat last week's (begs19Auig13) new releases - Mortal Instruments: City of Bones, The World's End and horror film You're Next round out the new top five.