Los Angeles, Oct. 15 -- Actress Carrie Preston recently reflected on her experience working with Julia Roberts during the filming of the 2009 thriller "Duplicity", revealing that Roberts' "mean" approach on set ultimately helped her deliver a pivotal performance.

During a recent interview on Jesse Tyler Ferguson's Dinner's on Me podcast, the actress recounted her experience working with the Oscar winner on the 2009 film as well as 1997's My Best Friend's Wedding, which was Preston's first movie, reports The Hollywood Reporter.

"We were 27, 28 years old at that time. And she was at the top of her game that young. And boy did she show it. That was a movie star," Preston said of Roberts. "I was very nervous around her, but she was such a pro...