Earlier today, Leonard Nimoy died at the age of 83.
The beloved actor, best known for his role as Dr. Spock on Star Trek (the TV show and the movie versions), passed away at his home in Bel-Air, having lost a battle with chronic obstructive pulmonary disease.
Last year, Nimoy went public with the diagnosis and blamed the disease on many years of smoking, even though he had given up the habit over three decades ago.
Leonard Nimoy sadly passed away at the age of 83. Here is a look at what many celebrities have said in the wake of his death...
"I loved him like a brother. We will all miss his humor, his talent, and his capacity to love."
"Today, the world lost a great man, and I lost a great friend. We return you now to the stars, Leonard. You taught us to 'Live Long And Prosper,' and you indeed did, friend. I shall miss you in so many, many ways."
"my heart is broken. i love you profoundly my dear friend. and i will miss you everyday. may flights…"
"RIP Leonard Nimoy. So many of us at NASA were inspired by Star Trek. Boldly go..."
"I shall truly miss Leonard Nimoy. He gave us a great gift that will last for ages. A good soul and kind man. RIP."
"Leonard Nimoy brought us one of the greatest, noblest characters in the history of American storytelling. Someone find the Genesis plane."
"Leonard Nimoy was more than Mr. Spock. But Mr. Spock is his gift to us all. Live long and prosper. HANX."
"HAIL HAIL, A GENIUS HAS VACATED THIS REALM! #LeonardNimoy gets beamed up 2 Zeir Anpin-the Endless Intelligence of Infinity. Rest in Peace."
"Sad to hear about the passing of Leonard Nimoy. He was a true renaissance man."
"Leonard Nimoy will always be a beloved legend."
"RIP Leonard Nimoy. You and your iconic Vulcan sign will be missed."
"Leonard Nimoy incredibly sad Spock has died."
"He created a role that nobody else could play. Multitalented writer,actor,director. A terrific&sweet man. RIP Leonard Nimoy #Spock #StarTrek."
""Well done, sir. Many thanks for all you gave us. You'll be greatly missed & forever remembered."
"Thoughts &prayers with @williamshatner today," the country rocker wrote on Instagram. "Sorry for your loss buddy. What a friendship you & Leonard had."
"I am devasted to learn that #LeonardNimoy has passed. Despite your passing your legacy will indeed #LiveLongAndProsper."
In the wake of his passing, numerous celebrities have taken to Twitter to express their condolences and share their memories of the veteran star.
William Shatner, for example, wrote of his long-time friend and colleague:
"I loved him like a brother. We will all miss his humor, his talent, and his capacity to love."
Scroll through the above photo gallery to read other tributes to Nimoy and take note of his final Tweet:
A life is like a garden. Perfect moments can be had, but not preserved, except in memory. LLAP.
ESPN's Stuart Scott (1965-2015) will forever be missed. The beloved anchor and personality passed away after a long battle with cancer in January at the age of 49.
Donna Douglas of the Beverly Hillbillies passed away in early 2015. She was 81 years old.
Mario Cuomo has passed away at the age of 82. He was New York's Governor from 1983-1994.
Ronnie Berlack and Bryce Astle, both U.S. ski team prospects, have been killed in an avalanche. R.I.P.
Andrae Crouch has died at the age of 72. The gospel music great passed away in January 2015.
Actor Rod Taylor (Time Machine, The Birds) died at the age of 84 in January.
Taylor Negron, a comic and actor is perhaps best known for Fast Times at Ridgemont High, died at the age of 57.
La Dolce Vita actress Anita Ekberg has passed away at the age of 83.
Kim Fowley has passed away. The producer and one of the legendary names in punk music was 75.
Greg Plitt was a Bravo reality star. He was 37 years old when he was struck by a train in Burbank, California.
ASAP Yams died at the age of 26. The Harlem native played/producer a key role in creating hip hop artists from that area of New York.
John Sundahl, a former boyfriend of Britney Spears, has been killed. He was shot down in a helicopter in Afghanistan.
Dallas Taylor, the drummer for Crosby, Stills & Nash, has passed away at the age of 66 in January 2015.
Darren Shahlavi is seen here on the NBC drama Constantine. The actor sadly passed away in early 2015.
Violetta Degtiareva suddently died of heart failure January 12. The Russian tennis star was just 23 years old.
Monty Oum, an animator best known for his work with Rooster Teeth, has died at the age of just 33.
U.S. aid worker Kayla Mueller was confirmed dead at the hands of ISIS in February. R.I.P.
Dean Smith retired from coaching in 1997 as the winningest coach in college basketball history. He passed away at the age of 83 in February of 2015.
The Emmy-winning reporter was killed in a NYC car accident in February.
David Carr, a popular columnist for the New York Times, died February 12 after collapsing in the newsroom. He was 58.
Lesley Gore passed away today at the age of 68. She is best remembered for her song "It's My Party."
Rest in peace, Lorena Rojas. This Mexican soap opera star lost her long battle with cancer in February.
Jerome Kersey, a 17-year NBA power forward, passed away at the age of 52 in February.
Betty Lou Motes, the beloved mother of Julia Roberts, died at the age of 80 in February.
Rest in peace, Harris Wittels. The comedian and TV producer died from a likely drug overdose at the age of 30.
Ahmad Givens was better known to VH1 fans as "Real." He died of colon cancer in February of 2015.
Ben Woolf appears here on American Horror Story: Freak Show. The actor passed away at the age of 34.
Ariel Camacho, a Mexican singer/songwriter, was only 22 years old when he was killed in a car accident.