Zoe Saldana: 'I had breakdown after Avatar'

Zoe Saldana has said that her success after Avatar caused her to break down.

The Star Trek actress confessed that she felt over-worked after the popularity of the James Cameron film, claiming that she collapsed due to stress.

"The year after Avatar was just emotionally overwhelming," Saldana told Latina. "I was travelling all over the world, waking up in different time zones. Your body gets exhausted, and by the end of the year I just collapsed."

Saldana went on to say that the stress began to take its toll while she was working on the action movie Columbiana.

"I was sitting in my hotel room, and I couldn't stop crying," Saldana said. "I couldn't stay awake. I must have slept for an entire month."

In July, Saldana revealed that she feels as though she has aged ten years from the numerous action roles that she has played.

The 33-year-old will be appearing as a guest judge on the ninth season of Project Runway. Other celebrities that will serve as judges throughout the season include Kim Kardashian, Christina Ricci and Malin Akerman.

Watch the trailer for Columbiana below: