Every star imaginable took to social media to celebrate David Letterman

Watch David Letterman Say Goodbye on His Final 'Late Show'

After 22 seasons, 4,262 episodes, and tens of thousands of celebrity guests, it's no surprise David Letterman's departure from The Late Show is hitting a lot of stars pretty hard.

Actors, comics and musicians have been taking to Twitter, Instagram and Facebook all day sharing congratulations as well as memories from their time on Dave's show.

[Stars and scenes from the May 20 finale:]

Photos from final Letterman show - Wednesday May 20 2015
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Every star imaginable took to social media to celebrate David Letterman
NEW YORK, NY - MAY 20: Rupert Jee of Hello Deli arrives at the final show for 'Late Show With David Letterman' on May 20, 2015 in New York City. (Photo by Bobby Bank/GC Images)
NEW YORK, NY - MAY 20: Peyton Manning arrives for the final episode of 'The Late Show with David Letterman' at the Ed Sullivan Theater on May 20, 2015 in New York City. (Photo by Donna Ward/Getty Images)
NEW YORK, NY - MAY 20: Rob Burnett departs 'Late Show with David Letterman' at Ed Sullivan Theater on May 20, 2015 in New York City. (Photo by Taylor Hill/FilmMagic)
NEW YORK - MAY 20: The Foo Fighters perform on the final broadcast of the Late Show with David Letterman, Wednesday May 20, 2015 on the CBS Television Network. After 33 years in late night television, 6,028 broadcasts, nearly 20,000 total guest appearances, 16 Emmy Awards and more than 4,600 career Top Ten Lists, David Letterman says goodbye to late night television audiences. The show was taped Wednesday at the Ed Sullivan Theater in New York. (Photo by Jeffrey R. Staab/CBS via Getty Images)

Some even shared stories of how Dave influenced their lives and careers. Parks and Recreation star Adam Scott shared, "A good 80% of why I wanted to do any of this was to one day sit on Letterman's couch."

Some stars didn't want to accept the reality of the situation. Jennifer Lawrence posted a photo begging Dave not to leave.

Even Dave's fellow late-night hosts (even those he's competed with) encouraged their viewers not to miss his last episode.

Many celebs just wanted to make it known that they appreciated all the laughs and good times from Dave's long, groundbreaking career in late-night television.

This truly is the end of an era, and it's going to be interesting to see how his successor, Stephen Colbert, does behind the Late Show desk.

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Bill Murray pops out of a cake as he says goodbye to David Letterman
Jimmy Kimmel's emotional Letterman tribute: I learned how to do everything from Dave
WATCH: George Clooney handcuffs himself to David Letterman
Julia Roberts reflects on her first 'Late Show' appearance: I didn't want to come on
Tina Fey gives Letterman dress off her back on 'Late Night,' declaring it the last fancy dress she'll ever wear
Kimmel won't air new episode opposite Letterman's final show
Obama jokes with Letterman about post-retirement life

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