This is the most well-known tongue twister in the English language…

Peter Piper Picked a Peck of Pickled Peppers - Irish Children's Songs - Ireland - Mama Lisa's World: Children's Songs and Rhymes from Around the World - Intro Image

Notes

A peck is a measurement used for dried goods. It's equal to 2 gallons.

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"Just turned 2 and my Irish daughter Ada makes a good/cute attempt at reading me the old English tongue twister "Peter Piper picked a peck of pickled pepper" instead of me reciting it to her :-)" -Mark

Thanks for sharing Mark. That's so cute! -Mama Lisa
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Thanks and Acknowledgements

This tongue twister can be found in Children's Literature, A Textbook of Sources for Teachers and Teacher-Training Classes (1920) by Charles Madison Curry and Erle Elsworth Clippinger. The illustration is from The Nursery Rhyme Book, edited by Andrew Lang and illustrated by L. Leslie Brooke (1897).

Thanks to Mark Jenkins for sharing the video!