Joaquin Phoenix is ''still plagued by self-doubt'' and admits he is often left ''petrified'' when he takes on new film roles.

The 45-year-old Joker actor has admitted he still finds himself feeling terrified when he takes on new projects, and is always anxious that he won't be able to find ''the right kind of space'' to give life to the character he is tasked with playing.

In a teaser for his upcoming interview on 60 Minutes interviewer Anderson Cooper notes in a voiceover: ''Phoenix is still plagued by self-doubt.''

Phoenix then says: ''Yes, petrified. There are so many things that I want to express when I take on a role."

"I go through the script, I'm just like, full of ideas and so, I guess I'm just nervous that I'm not going to be able to find the right kind of space to express that.''

During the interview, Phoenix will also discuss his childhood and the tragic death of his brother, the late actor River Phoenix, who passed away in 1993 at the age of 23 of combined drug intoxication.

The show will also feature the first group interview with the Phoenix family in decades.