Avengers Assemble made it three weeks at the top of the UK box office and has now grossed £40 million since it's release.
The movie has broke the $1 billion dollar mark this week and remain at the top of the U.S. box office after taking a further $103 million in it's second week on release.
Avengers Assemble becomes the first movie of 2012 to break the $1 billion barrier and becomes the twelfth movie to achieve that feat.
American Pie: Reunion remained at number two for the second consecutive week while Dark Shadows was the highest new entry in the chart at number three.
The movie marks the return to the big screen for actor Johnny Depp as he teams up with Tim Burton for the eighth time.
The Lucky One and Beauty and the Beats 3D both fell a single place to four and five to round off the top five.
Safe and Salmon Fishing in the Yemen were both down one at six and seven while Piranha 3DD was the second new entry at number eight.
How I Spent My Summer Vacation is the new movie project for Oscar winner Mel Gibson but it could only manage ninth and was the third and final new entry inside the top ten this week.
The top ten was rounded off by The Hunger Games, which had fallen three places from last week's number seven.
The movie has now grossed £23.4 million in this country alone and $624 million worldwide.
1.(1) Avengers Assemble, £4,169,087
2.(2) American Pie: Reunion, £2,546,626
3.(-) Dark Shadows, £2,404,029
4.(3) The Lucky One, £431,576
5.(4) Beauty and the Beast 3D, £422,924
6.(5) Safe, £298,201
7.(6) Salmon Fishing in the Yemen, £259,550
8.(-) Piranha 3DD, £242,889
9.(-) How I Spent My Summer Vacation, £152,728
10.(7) The Hunger Games, £143,542