May 16, 1957 –

The Merrie Melodies short, Tweety and the Beanstalk, directed by Friz Freleng, starring Sylvester and Tweety, debuted on this date.
Not only does Sylvester break the fourth wall, he refers to Tweety as a Tweety Bird.
Where the Cabinet of Dcaligari resides
May 16, 1957 –

The Merrie Melodies short, Tweety and the Beanstalk, directed by Friz Freleng, starring Sylvester and Tweety, debuted on this date.
Not only does Sylvester break the fourth wall, he refers to Tweety as a Tweety Bird.