The 47-year-old 'Friends' star is nervous of coming face-to-face with Pitt and his actor-fiancee Angelina Jolie at Clooney's wedding ceremony, so is doing everything she can to put her anxieties to rest, reported Grazia magazine quoting sources.
"Jen's no stranger to therapy, so she decided to seek some help. At the wedding, she'll have Justin there for support, but the thought of seeing Brad and Angelina is quite overwhelming.
"The therapist has been helping to build her confidence and eliminate the fear she seems to have built up about coming face-to-face with them," said a source, adding that Aniston has also been having hypnotherapy.
"The Oscars were one thing, but George's wedding will involve being in a smaller, far more intimate group where they won't be able to avoid one another. Jen wants to be as breezy as possible. She has been doing role plays with her confidence coach and will be as prepared as she can be," the source said.