Screenings of Michael Jackson's This Is It generated an estimated $4.4million in its opening two days in the US.

The film, which shows the late singer's final days, opened late on Tuesday after being premiered simultaneously in 19 different countries.

Trade publication Variety says This Is It took around $2.2million on Tuesday and the same number on Wednesday.

It is on course to replace Hannah Montana/Miley Cyrus: Best of Both Worlds Concert Tour as the highest grossing opening for a concert film.

Released in 2008, the teen star's film took $31million during its opening weekend.

This Is It opened in 3,500 theatres in the US and is also performing well around the world, where it will eventually be screened in 110 countries.

As previously reported, the sale of the footage used in the film has made Jackson the third top-earning dead celebrity.

The late singer's estate has also been bolstered by the renewed interest in Jackson's music.

(by Jason Gregory)