David Duchovny and Gillian Anderson star in the movie
The second X Files film has failed to make a big impact on the UK box office chart in its opening weekend.
I Want To Believe, which sees David Duchovny and Gillian Anderson reprise their roles as agents Mulder and Scully, opened at number four.
But although the alien-hunting movie was the highest new entry, it only took £887,209 in ticket sales.
Anderson blamed the film's limited success in the US due to opening against Batman film The Dark Knight.
The X Files also opened at number four in the North American box office taking $10.2m (£5.1m), in its first three days.
UK & IRELAND BOX OFFICE
1. The Dark Knight - £6.7m
2. Mamma Mia! - £3.2m
3. Wall-E - £2.1m
4. The X Files: I Want to Believe - £887,209
5. Angus, Thongs and Perfect Snogging - £716,344
6. Kung Fu Panda - £628,741
7. Space Chimps - £563,543
8. The Love Guru - £498,829
9. Hancock - £457,096
10. Journey to the Centre of the Earth - £163,018
Source: Screen International
"It's had a bit of a rough time in the States - it's opening against one of the highest grossing movies, Batman," she told the BBC at the film's London premiere.
"People in the States are so used to lots of CGI, action and sex and we don't really offer a lot of that in this film."
The Dark Knight remained at the top of the UK chart for a second week, taking £6.7m, while musical Mamma Mia! and animation Wall-E held fast at number two and three respectively.
Teen comedy Angus, Thongs and Perfect Snogging fell one place to number five.
There were two other new entries on the chart - family animation Space Chimps at seven, and Mike Myers comedy The Love Guru at eight.