Somehow this didn't surprise me

From Moviehole:

Moore to play Scully in X-Files sequel
Date : April 1, 2007 Posted By : Clint Morris

Another month … another makeover for a popular film franchise.
Hot on the heels of David Duchovny’s comments that the next “X-Files” movie is being brokered as we speak comes news from CarterEsque.com that co-star Gillian Anderson – who has played his sciency subordinate since the series’ commencement in 1993 – has opted out of the new film.
Reports say Twentieth Century Fox is now in talks with Julianne Moore to replace Anderson as Agent Dana Scully. A deal is expected to be made before the end of the month.
Anderson, whose star has risen considerably in the past couple of years (she recently appeared in the Oscar Winning “King of Scotland”), says via her reps that “[X-Files] has been a wonderful experience, and I will always cherish my time on the series [and] the film, but the time has come to move on - I just don’t believe I can bring anything more to the character at this point. I wish the filmmakers my heartfelt best”.
Ironically, Julianne Moore also took over from Jodie Foster when she decided not to reprise her role as Agent Clarice Starling in “Hannibal”, the “Silence of the Lambs” follow-up, a couple of years back.
“The X-Files 2” will be the third film for Duchovny and Moore. They previously co-starred together in “Evolution” and the recent “Trust the Man”.
Thanks to ‘Loof Lirpa’