Movies
The superhero blockbuster took £5.5 million, pushing last week's number one Forgetting Sarah Marshall into second with £1.3 million.
Adventure-fantasy Nim's Island and Patrick Dempsey comedy Made of Honour enter the chart at third and fourth respectively, while animated film Persepolis jumps four to ten.
Elsewhere, Jessica Alba horror The Eye slips from second to fifth and treasure hunt movie Fool's Gold drops four to eight.
The top ten movies in full:
1. (-) Iron Man - £5,518,636.
2. (1) Forgetting Sarah Marshall - £1,341,834
3. (-) Nim's Island - £828,225
4. (-) Made Of Honour - £756,929
5. (2) The Eye - £369,842
6. (3) 21 - £322,408
7. (5) In Bruges - £299,898
8. (4) Fool's Gold - £191,085
9. (10) Happy-Go-Lucky - £180,148
10. (14) Persepolis - £127,638
More: Movies, UK: Box Office Chart
Movie Reviews
'The Vow' reviewChanning Tatum tries to win back Rachel McAdams in romantic drama The Vow.
At the Movies
This Week's 5 Hottest Movie VideosTrailers for The Avengers and Spider-Man are among this week's highlights in film.
Movies Interviews
Daniel Radcliffe talks 'Woman in Black'The actor talks to Digital Spy about his first post-Potter outing.
Box Office Charts
'Chronicle' leads UK box officeSuperhero drama Chronicle leads the UK box office ahead of Journey 2.
