United Kingdom, March 19 -- Chet Hanks will never take his parents' support "for granted".

The 34-year-old star is the son of Hollywood legends Tom Hanks and Rita Wilson and admitted that after making the decision to go sober over three years ago that he is "really grateful" for the way they have stood by him through everything.

Speaking on 'The Drew Barrymore Show', he said: "I'm one hundred percent sober. [My parents] have been there through thick and thin. They've always been super supportive of me.

"And I don't take it for granted. I'm really, really grateful for both my parents. I'm at the age where I'm just really grateful for them. I really cherish the time that I have spent with them.

"They've stuck with me through thick and t...