Mark Hamill Is 'Devastated' Over Carrie Fisher's Death

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Mark Hamill is in mourning.

The Star Wars actor took to Twitter on Tuesday to offer a simply heartbreaking tribute to his late friend and co-star, Carrie Fisher.

"No words," he captioned a black-and-white throwback photo of the pair, dressed in character as Luke Skywalker and Princess Leia, respectively. Hamill ended his tweet with the hashtag "#devastated."

READ: Stars React to Carrie Fisher's Death

Fisher died on Tuesday morning after going into cardiac arrest on a flight from London to Los Angeles last week.

"It is with a very deep sadness that Billie Lourd confirms that her beloved mother Carrie Fisher passed away at 8:55 this morning,” family spokesperson, Simon Halls, said in a statement to ET on behalf of Fisher’s daughter, Billie Lourd, on Tuesday. “She was loved by the world and she will be missed profoundly. Our entire family thanks you for your thoughts and prayers."

Fellow Star Wars actors -- including Anthony Daniels (C3PO), Peter Mayhew (Chewbacca), Billy Dee Williams (Lando Calrissian), Warwick Davis (Ewok Wicket) and Dave Prowse (Darth Vader) -- also tweeted about Fisher's death on Tuesday.

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Statements were also issued on behalf of The Walt Disney Company chairman and CEO, Robert A. Iger, as well as Lucasfilm president, Kathleen Kennedy.

"Carrie Fisher was one-of-a-kind, a true character who shared her talent and her truth with us all with her trademark wit and irreverence," wrote Iger. "Millions fell in love with her as the indomitable Princess Leia; she will always have a special place in the hearts of Star Wars fans as well as all of us who were lucky enough to know her personally. She will be sorely missed, and we join millions of fans and friends around the world who mourn her loss today."

"Carrie holds such special place in the hearts of everyone at Lucasfilm it is difficult to think of a world without her. She was Princess Leia to the world but a very special friend to all of us," echoed Kennedy. "She had an indomitable spirit, incredible wit, and a loving heart. Carrie also defined the female hero of our age over a generation ago. Her groundbreaking role as Princess Leia served as an inspiration of power and confidence for young girls everywhere. We will miss her dearly."

Fisher is best known for her legendary role as Princess Leia in the original Star Wars trilogy. Fisher is survived by her mother, actress Debbie Reynolds, and 24-year-old daughter, Billie.

WATCH: Carrie Fisher Dies at 60