Reese Witherspoon has reportedly banned mobile phones on the set of her new film - to stop pictures of her and co-star Jake Gyllenhaal from being taken. The Oscar-winning actress only filed for divorce from her husband of seven years Ryan Phillippe last month and is determined not to be linked to her dashing, single co-star. A source told Us Weekly magazine: "Reese doesn't want any rumors about her and Jake." It has been claimed that New Line Cinema introduced the ban on cell phones on the set of 'Rendition', but the film studio has so far refused to comment on the matter. However, Reese's apparent ban may have come too late as news of her and Jake's budding friendship has already been circulating after the pair were spotted enjoying a lengthy chat. A source said: "Jake stopped by her trailer and waited for her. They laughed and talked then he left."Reese, 30, cited irreconcilable differences as the reason for her split from Ryan and has asked for custody of the couple's two children - seven-year-old Ava and three-year-old Deacon - but with visitation rights granted to her husband.