Rose McGowan as Cherry Darling in Robert Rodriquez's Planet Terror (GRINDHOUSE)
The project, which features Rodriguez's PLANET TERROR and Tarantino's DEATH PROOF, was expected to debut at number one, but experts claim the three-hours-plus running time of the films put many fans off.
Grindhouse was expected to make $20 million in its opening weekend, but fell well short.
Ice skating comedy BLADES OF GLORY kept the top spot for a second week, with an estimated $23 million (GBP11.8 million) take, while futuristic animated movie MEET THE ROBINSONS stayed at number two in its second weekend on release with $17 million (GBP8.7 million).
Source: WENN