United Kingdom, Dec. 13 -- Dick Van Dyke was "locked up with the psychos" in rehab.

The Mary Poppins actor - who celebrates his 100th birthday on Saturday (13.12.25) - checked into a hospital to get sober in 1972 and admitted the facilities back then were nothing like the modern clinics of today.

He said: "I remember going to rehab and it being nothing like today. In my day they used to lock you up with the psychos! Down in St Luke's, in Phoenix - they didn't have any special rehab place.

"The place was locked up and you were in there with the loony people.

"It was only two weeks back then, although I did the whole AA 12-step thing afterwards.

"But hey, You're nobody if you haven't been to rehab these days. Whether you have a problem...