That was over 54 years ago in 1967.
In 2016 he died aged 83, starring in 37 films in his career, 34 since Bonnie and Clyde was released.
In Bonnie and Clyde, I think Gene Wilder looks:
Bonnie and Clyde scores 7.6 out of 10 on The Movie Database.
Gene Wilder's first acting role was as 'Bernard' in Death of a Salesman, released in 1966 when he was 32.