The late actor is being remembered by costars and castmates after his unexpected death at 54.

The extendedFriendsfamily is mourning the loss ofMatthew Perry.

Rest well, Matthew Perry.

Matthew Perry, Courteney Cox, and Elliott Gould on ‘Friends’

Matthew Perry, Courteney Cox, and Elliott Gould on ‘Friends’.Danny Feld/NBCU Photo Bank

Thank you for the kindness and laughter."

I first met Matthew in 1994 when I joined the NBC sitcomFriends.

Matthew was kind, thoughtful, smart, funny, and just a terrifically talented actor."

My heart goes out to his wonderful family.

He will be missed by so many but he will never be forgotten."

The loss of such a brilliant young actor is a shock.

I really loved him."

Azaria also noted that he has been sober for 17 years, thanks in part to Perry’s help.

“The night I went into AA, Matthew brought me in.

The whole first year I was sober, we went to meetings together,” he explained.

The world will miss you, Mathew Perry.

The joy you brought to so many in your too-short lifetime will live on.

I feel so very blessed by every creative moment we shared."

She urged fans to read his 2021 memoir,Friends, Lovers and the Big Terrible Thing.

“It was his legacy to help,” Brewster added.

“He won’t rest in peace though.

He’s already too busy making everyone laugh up there.”

Selma Blair, who guest-starred on season 9 ofFriends,shared a selfieof her and Perry smiling.

“My oldest boy friend,” she captioned the post.

“All of us loved Matthew Perry, and I did especially.

I loved him unconditionally.

And I’m broken.

Sweet dreams, Matty.

Christina Ricci, who didn’t appear onFriendsbut guest-starred on theMatt LeBlanc-led spinoffJoey, mourned Perry on Instagram.

“I burst into tears when I read the news today,“she wrote.

I adored his character and wanted to marry Chandler Bing as a teenager.

I watched all his movies.

He was a genius.”

Sharing a photo of his memoir, Ricci added, “Read his book.

It’s another gift he gave us.

If you’re struggling with addiction issues it might just keep your life.”

He was a true gift to us all.

Our heart goes out to his family, loved ones, and all of his fans.”

He was a five-time Emmy nominee.

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