Gillian Anderson ’s 2008 visit to the Cannes Film Festival was not especially auspicious. The Chicago-born actress was still most closely associated with the TV series The X-Files . In fact, that year she also starred in the second film spun off from the series, The X-Files: I Want to Believe . She did make a glamorous appearance as she walked the red carpet for the 61st festival’s opening night film, Fernando Meirelles’ Blindness , in a white Alberta Ferretti gown. (Asked what makes a successful red carpet gown, she cracked, “I guess what fits. If something fits, you wear it.”) But the film that actually brought her to the Croisette was Robert Weide’s How to Lose Friends & Alienate People , starring Simon Pegg and loosely based on British journalist Toby Young’s memoir about his disastrous stint at Vanity Fair .…