Trust Julia Roberts to embrace any role fully but there is one thing that the actress will not be comfortable with: guns.<br />Back on the big screen with "Secret in Their Eyes," Roberts plays Jess, whose life was turned upside down when her daughter was murdered.<br />It's been 13 years since her daughter's death but new information has come up, giving Jess, an FBI investigator, her partner Ray and District Attorney Claire a lead that could help them close the case once and for all.<br />As Jess' line of work meant she deals with guns on a regular basis, Roberts had to film some scenes using a gun.<br />Of course, the actress used fake guns but that didn't make a lot of difference to her.<br />"I realized when I have a gun in my hand I'm really unhappy," she said, pointing out that it's funny that it was when she was in full uniform with a gun in her hand that she didn't feel like she had an inner tough girl.