08/10/2012 4:17 AM AEDT | Updated 07/12/2012 9:12 PM AEDT

Colin Farrell Talks Childhood Habits With Jay Leno On 'The Tonight Show': 'I Used To Pull My Hair Out' (VIDEO)

Actor Colin Farrell poses for a picture as he promotes the movie "Seven Psychopaths" during the 2012 Toronto International Film Festival in Toronto on Friday, Sept. 7, 2012. (AP Photo/The Canadian Press, Chris Young)

Colin Farrell's childhood consisted of some very peculiar habits.

"I was a hair puller, I used to pull my hair out," the 36-year-old actor told Jay Leno on "The Tonight Show" on September 5.