Movies
The Kenny Ortega-helmed documentary knocks Pixar's Up from the chart summit with £4.8 million in ticket sales.
Fantastic Mr Fox is at number three, Saw VI slips two spots to four and Cirque du Freak maintains its place at five.
Elsewhere, the chart sees new entries from animated film 9, coming-of-age comedy drama An Education and crime thriller Dead Man Running.
The UK box office top ten in full:
1. (-) This Is It - £4,877,255
2. (1) Up - £3,443,130
3. (3) Fantastic Mr Fox - £1,545,325
4. (2) Saw VI - £940,505
5. (5) Cirque du Freak: The Vampire's Assistant - £544,676
6. (4) Couples Retreat - £500,258
7. (-) 9 - £468,455
8. (-) An Education - £399,122
9. (6) The Imaginarium Of Doctor Parnassus - £323,294
10. (-) Dead Man Running - £198,442
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