That was over 56 years ago in 1964.
Today he is 94, and has starred in 44 movies in total, 41 since Mary Poppins was released.
In Mary Poppins, I think Dick Van Dyke looks:
Mary Poppins scores 7.5 out of 10 on The Movie Database.
Dick Van Dyke's first acting role was as 'Bert/Mr. Dawes, Sr.' in Mary Poppins, released in 1964 when he was 38.
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