Jessica Chastain dropped out of high school.

The 'Interstellar' star - who attended El Camino Fundamental High School in Sacramento, California - has revealed that she was a ''terrible student''.

She shared: ''Nobody knows this about me - I dropped out of high school.

''I was not a hard worker. I was a terrible student.''

The 37-year-old actress - who later attended The Juilliard School through a scholarship from Robin Williams - admitted that she was too absent at her high school to graduate.

She said: ''Eventually I got my adult diploma, but I did not graduate.

''It wasn't that I just dropped out and never went back - at the end of the year I had too many absences to graduate... I would cut school and sit in my car, reading Shakespeare.''

Jessica also revealed that her confidence in her own intelligence plummeted and has offered advice to children who may be feeling the same as she did.

She told Entertainment Weekly: ''I thought that I wasn't an intelligent person because I did so poorly.

''There are kids out there that aren't doing well in school and I hope they never think it means they're stupid. It's all about finding where your interest lies and finding what you're good at.''