After 33 years on the air, David Letterman said his final farewell last night to the "Late Show."

Throughout the day, many actors, athletes, comedians, and politicians took to social media to post their memories with the veteran late night host.

Check out some of the tributes below:

Kelly Ripa:"Thanks Dave........for everything. ❤️💔"

Lena Dunham:"Dear Dave- you really know how to make a gal feel like a trillion bucks. Thank you for it all. Love- Lena"

Kim Kardashian:"Thank you for so many laughs! You will be greatly missed @Letterman."

Sarah Silverman:"Gonna miss this man something awful. #DAVE"

"Last time I was on #DAVE I wrote him this note ."

Chris Rock:"And the new host of the late show is."

Mindy Kaling:"Thank you, Dave. Love you. ❤️"

Olivia Munn:"You weren't so scary after all. 💙 #latenight #letterman #finalshow"

Mandy Moore:"It's grainy but all I could find of my first appearance on #Letterman. What an honor. We'll miss you, Dave but thanks for it all."

Debra Messing:"OH DAVE....NO ONE has ever made me more giddy than you. Thank you for your kindness, your playfulness, your singular wit. There has never been and will never be, anyone like you."

Sean Hayes:"We'll miss you in Late Night, Dave. Thanks for being a comedic hero to me. #ThanksDave @Letterman."

Jessica Alba: "My very first time on @letterman - I will never forget how comfortable you made me feel - I was SOOOOOOO nervous!!! #thanksdave for all of the amazing memories and laughs! #davidletterman #darkangel."

"Can't believe I was pregnant w Honor in this one #thanksdave - we will miss you @letterman"

"Last one ...#thanksdave for all the laughs, memories and support throughout the years - we are really going to miss you @letterman" 

Many also tweeted their final farewells:

And some even took to Facebook:

Even Letterman's competition posted tributes:

SEE ALSO: Tina Fey, Jerry Seinfeld, Bill Murray, and more read Letterman's final 'Top 10' list

MORE: David Letterman cracks self-deprecating jokes in last monologue

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