Jennifer Aniston has no wedding dress yet

The 44-year-old actress Jennifer Aniston has admitted she hasn't yet chosen her wedding dress because she has been so busy with producing her upcoming movie 'Call Me Crazy: A Five Film' and has had to put all planning for her nuptials to fiancé Justin Theroux, 41, on hold.

The former 'Friends' star admits organising her big day - which is rumoured to be taking place in May - might make her "crazy" because she has got so much to do.

When asked if she had picked her gown at the premiere of 'Call Me Crazy: A Five Film' at the Pacific Design Center in West Hollywood earlier this week, she said: "No, no, no."

As Jennifer's hectic schedule begins to build, she has handed the task of house hunting in New York City over to her husband-to-be.

Although it has been taking up so much of her time, Jennifer is proud to have worked on 'Call Me Crazy' - a compilation of five short films focusing on mental illness.

The screen beauty insists the project tackles a subject that suffers from a negative perception and stigma that needs to be addressed.

She said: "Mental illness seemed to be [a topic] that a lot of us felt was an important one and touched a lot of our lives, a lot of our families lives. That seemed like one that needed attention because all of the stigma around it and the sort of shame around it."

'Call Me Crazy' premieres on Lifetime on April 20.