Dwayne Johnson was 3 in WWE Talk: Live Event Premiere '06-07' when he played the character 'Rock'.
That was over 47 years ago in 1976.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 51, and has starred in 245 movies in total, 230 of those since WWE Talk: Live Event Premiere '06-07' was released.
In WWE Talk: Live Event Premiere '06-07', I think Dwayne Johnson looks: