Witherspoon and Gyllenhaal an item?

Reese Witherspoon is reportedly growing close to Jake Gyllenhaal on the set of their new film Rendition.

The Oscar-winning actress filed for divorce from husband Ryan Phillippe earlier this month and Jake has been her shoulder to cry on.

A source from the film set told Us Weekly magazine: "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 divorce 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.

Reese, 30, has also requested "exclusive use of the family residence" and asked that the court terminate its right to grant Ryan spousal support.

Jake, 25, broke up with long-term girlfriend Kirsten Dunst last year and despite being linked to a number of women has been single ever since. It was recently reported that Ryan had an affair with 24-year-old Australian actress Abbie Cornish after meeting her on the set of their movie Stop Loss.

However, Abbie has vehemently denied the allegations, insisting the pair are nothing more than "good friends".

She said: "We were very good friends and we did spend a lot of time together. But we're friends and that's it."