You may have seen Sam's monster mouth on TikTok, but now it's Guinness World Records official!
Samantha Ramsdell, from the USA, holds the record for the largest mouth gape (female) at 6.52 cm (2.56 in).
At Guinness World Records we want to show that everyone in the world is the best at something, and we’re here to measure it! Whether you’ve got the stretchiest skin, know the world’s smallest dog or want to create the largest human dominoes chain we want to hear about it.
Here on the Guinness World Records YouTube channel we want to showcase incredible talent. If you're looking for videos featuring the world's tallest, shortest, fastest, longest, oldest and most incredible things on the planet, you're in the right place.