Many in the entertainment world are dropping the platform
The 'Ugly Betty' star looks a bit tired of playing softball. Here she is yawning on set, in April 2008.
The actress goes out for a morning (iced) coffee run, even though she doesn't look ready to get out of bed just yet.
Is Jennifer Aniston that boring? The actor shoots a scene of the movie 'Just Go with It' in LA.
Hit me tiredness one more time! The singer relaxes while her sons enjoy the pool in Marina Del Rey, California, in August 2009.
We know, Simon–not everyone who goes on 'Britain's Got Talent' actually has talent. Here's the judge, looking pretty bored during series 7 of the show in 2013.
The 'Back to the Future' star is spotted yawning while filming in 2013.
The actress is seen on the set of 'House of Lies' on November 21, 2012. She looks a bit tired...
The actor is such an adrenaline junkie that the car action scene he was shooting with Emily Blunt in London was boring him.
How boring is hanging out with friends on a yacht in Miami, right? The singer was not feeling it, apparently.
Wakey, wakey, Iron Man! The actor and his wife, Susan Downey, are seen in West Hollywood, California on February 23, 2009.
We wonder if had a good night's sleep before this Brazil training session during the FIFA World Cup in Russia in 2018.
We bet the actor would rather be in Miami, chasing criminals wearing a white, oversized blazer with the sleeves rolled up, than be at the 2005 Roland Garros Tennis Tournament in Paris.
"I'll be back (in bed, soon)!" The actor and former governor of California yawns as he attends the Pope's audience at the Vatican on January 25, 2017.
How boring was the opening ceremony of the World Team Challenge 2009 tournament in Hong Kong?
It looks like Spider-Man found the game between the Los Angeles Lakers and the Chicago Bulls on November 21, 2004 a bit boring!
Another actress yawning on set. This time, during the shooting of 'Mona Lisa Smiles' on January 13, 2003, in New York City.
The singer yawns at the 16th Annual EIF Revlon Run/Walk for Women on May 9, 2009, in Los Angeles. It was early in the morning, apparently.
A young and spotty Cristiano Ronaldo, looking pretty bored, back when he was a Manchester United player.
The Spanish tennis star yawns while practicing during Wimbledon on June 30, 2011.
The actress is spotted yawning outside the 'Good Morning America' set on October 9, 2013, in New York City.
Did you think you'd see the Queen with her mouth wide open? Never! She discretely yawns during a visit to the Indian National Defence Academy in Pune, India, on November 21, 1983.
The Argentinian soccer star yawns during the FIFA World Cup in Brazil in 2014.
President Barack Obama looking tired during a meeting at the Warsaw NATO Summit on July 8, 2016 in Warsaw, Poland.
The former supermodel showing some signs of tiredness at a restaurant in New York City in April 2006.
The then-First Lady yawns while watching the Oregon State University vs. University of Akron college basketball game in Honolulu, Hawaii, on December 22, 2013.
Catherine, Duchess of Cambridge discretely yawns at the balcony of Buckingham Palace during Trooping the Colour, Queen Elizabeth II's birthday parade, on June 14, 2014.
The late actress yawns as she poses in 1954.
Sources: (ScienceDirect)
See also: Celebs caught wearing matching outfits
We all yawn–usually when we're sleepy, or bored. To this day, experts aren't 100% sure why we yawn, but research indicates that yawning might be a way to cool down our brains. While it's a natural thing to do, we tend to cover our mouths when we yawn in public, and so do some celebs... but not always!
In this gallery, we bring you snaps of stars who've been caught yawning in public. Click on for some laughs!
Monday challenge! Can you go through these celebs pictures without yawning?
These stars can't keep their mouth shut... literally!
CELEBRITY Humor
We all yawn–usually when we're sleepy, or bored. To this day, experts aren't 100% sure why we yawn, but research indicates that yawning might be a way to cool down our brains. While it's a natural thing to do, we tend to cover our mouths when we yawn in public, and so do some celebs... but not always!
In this gallery, we bring you snaps of stars who've been caught yawning in public. Click on for some laughs!