In this image released by New Line Cinema, Jackie Chan (left) and Chris Tucker are shown in a scene from 'Rush Hour 3'. ap

LOS ANGELES, (Reuters):

Hapless martial arts hero Jackie Chan knocked amnesiac assassin Jason Bourne out of the top spot at the box office this weekend.

Rush Hour 3, the buddy film starring Chan and Chris Tucker that comes six years after the duo's last romp, grossed $50.2 million in its first weekend at United States and Canadian theatres.

The Bourne Ultimatum, the third instalment of the espionage action series starring Matt Damon as a one-time CIA hit man searching for his past, took in $33.7 million in its second weekend playing in North American theatres, a 51 percent drop, according to studio estimates on Sunday.

Animated feature The Simpsons Movie dropped 56 percent in its third weekend to $11.1 million, but pot-bellied anti-hero Homer Simpson still came out on top of two newcomers.

In their first weekends, Stardust, a fantasy film starring Claire Danes, grossed $9.0 million at number four on the charts, and Daddy Day Camp took in $3.6 million and debuted at number 10.

The long delay since the last Rush Hour was seen as a challenge for Tucker and Chan. Rush Hour 2 set a record August opening of $67.4 million in 2001, which held until last week, when The Bourne Ultimatum took in $69.3 million.

1 Rush Hour 3 ... $ 50.2 million

2 The Bourne Ultimatum ... $ 33.7 million

3 The Simpsons Movie ... $ 11.1 million

4 Stardust ... $ 9.0 million

5 Underdog ... $ 6.5 million

6 Hairspray ... $6.4 million

7 I Now Pronounce You

Chuck & Larry ... $5.9 million

8 Harry Potter and the Order of the Phoenix ... $5.4 million

9 No Reservations ... $3.9 million

10 Daddy Day Camp ... $3.6 million