Jolie has denied reports of a romance with co-star Pitt

The action thriller, starring Pitt and Jolie as married assassins hired to kill one another, trumped the current Star Wars film after three weeks.

It took �3.9m on its opening weekend, putting it top of the box office on both sides of the Atlantic.

India's Parineeta was the only other new film to breach the top 10.

UK & IRELAND TOP FIVE 1. Mr and Mrs Smith 2. Stars Wars: Episode III - Revenge of the Sith 3. Sin City 4. The Pacifier 5. House of Wax Source: Screen International

Directed by Doug Liman, executive producer of The Bourne Supremacy, the film has been released amid rumours of a relationship between the stars.

Comic book action film Sin City continued to perform well at number three, taking more than �1m at the weekend.

The Pacifier, starring Vin Diesel, and horror remake House of Wax with Paris Hilton, round out the top five.

However, The League of Gentlemen's Apocalpse - the feature film based on the BBC Two comedy series, fell to number seven after just one week.