The 60-year-old was the subject of controversy in 2006 when he was arrested by a policeman in Malibu for drunk driving, and was subsequently filmed giving an anti-Semitic rant, reported Female First.
He then landed himself in trouble again in 2010 when his ex-girlfriend Oksana Grigorieva claimed the "What Women Want" actor had punched her and broken her teeth. She then released secretly recorded audio in which Gibson allegedly went on another racially-charged tirade.
Now, the "Braveheart" star has credited Alcoholics Anonymous for helping him clean up his life, and insists he's a changed man.
The star now describes his past outbursts as the "worst moment" of his life, and says what he did "wasn't meant to be public".
"Imagine the worst moment you have even had being recorded and broadcast to the world and it wasn't meant to be public.
You didn't stand on a soapbox and do it, but that's what happens, you know," he said.