We just learned earlier this morning that Adam West, the actor best known for starring in the 1960s Batman series, has passed away.
He was battling leukemia, and sources say that he died in his sleep.
He was 88 years old.
Though we just learned the news a little while ago, celebrities everywhere are already taking time to remember Adam on Twitter.
Check out some of the most touching messages below.
Burt Ward

“I am devastated at the loss of one my very dearest friends,. Adam and I had a special friendship for more than 50 years. We shared some of the most fun times of our lives together. Our families have deep love and respect for each other. This is a terribly unexpected loss of my lifelong friend. I will forever miss him. There are several fine actors who have portrayed Batman in films. In my eyes, there was only one real Batman that is and always will be Adam West. He was truly the Bright Night.”
Julie Newmar

“Stellar, exemplar, a king to the end. He was bright, witty and fun to work with. I will miss him in the physical world and savor him always in the world of imagination and creativity. He meant so much to people – A friend said: ‘The father that we wanted.’ That is a great gift, no matter how you live it.”
Seth MacFarlane

“Family Guy has lost its mayor, and I have lost a friend. Adam West was a joy to work with, and the kind of guy you always wanted to be around. His positivity, good nature, and sense of fun were undeniable, and it was always a big jolt of the best kind of energy when he walked in to record the show. He knew comedy, and he knew humanity. I am beyond fortunate to have had the privilege of working with him, and he will be profoundly missed by all of us. Thank you from the bottom of my heart for all that you have given, Mr. Mayor. You’re irreplaceable.”
Will Arnett

“RIP Adam West. You will always be Batman.”
George Takei

“RIP Adam West. You’ll always be Batman to me.”
Elijah Wood

“Sad to hear of Adam West’s passing. A legend as Batman but also, Ty Lookwell.”
Slash

“Really saddened to hear of Adam West’s passing. We will miss you! a lot. RIP.”
Jamie Lee Curtis

“Holy heartbreak Batman. Adam West was a big part of my childhood. We were acquaintances in my adulthood. A wonderful man who will b missed.”
Ryan Seacrest

“Rest in peace to a true tv legend who defined the caped crusader role for so many others #adamwest.”
Mark Hamill

“#AdamWest was such a wonderful actor & so kind, I’m so lucky to have worked w/ him & tell him how much he meant to me & millions of fans.”
Lea Thompson

“As a little girl #AdamWest was my hero. His #tongueincheek delivery, his commitment to the ridiculous, would inform my whole esthetic #RIP.”
Zelda Williams

“RIP Adam West, hilarious voice actor and my favorite (and most Gif-able) Batman. You’ll be sorely missed.”
Rosario Dawson

“To the icon behind the mask, the voice behind the animations… Howling to the full moon Batman signal in the sky that finally called you home… Thank you for your delight and humor and talent all of these decades great one. #ThankYouForYou #AdamWest #RestInParadise #YouBringMeJoyWhenImDown.”
Neil Gaiman

“Rest in Peace Adam West. We met once in 1987 and I was too embarrassed and too foolishly ‘cool’ to tell you what you meant to my childhood.”
Jaden Smith

“Rest In Peace To The Legend To The Original Hero, Adam West thank You We Love You. #Batman.”
Conan O’Brien

“Adam West gave probably the most inspired and ingenious performance in the history of television. He is revered by my generation of comic minds. He was also a sweet and lovely man, and it was a rare honor to know him.”
Kaley Cuoco

“So sorry to hear about the passing of Adam West. Still can’t believe we worked with him on our 200th episode @bigbangtheory_cbs. he was as cool as you would imagine him to be … #batman”
Billy Zane

“‘When is a Bat like an Angel? Precisely Robin! When he flies to heaven.’ R.I.P. #AdamWest my favorite #Batman”
Kumail Nanjiani

“RIP Adam West. First person I saw who was funny, badass & cool all at once.”