Celebrities Mourn The Death Of 'Sex and the City' Star Willie Garson

It is a sad day for the cast and crew of “Sex and the City.”

Beloved actor and longstanding cast member of the series Willie Garson has died at 57-years-old.

Willie played Sarah Jessica Parker’s character’s gay best friend, Standford Blatch, in the hit HBO series and subsequent films.

On Tuesday, September 21, “Bosch” star Titus Welliver broke the news of his passing on Twitter.

He wrote, “There are no words. I love you dear brother. We are fewer,” and attached a photo of Willie to the post.

What many fans may not know is that Willie was battling cancer before his passing. It is not yet known if it was the cancer that caused his death or something else.

Actress Julie Bowen took to Instagram writing, "This breaks my heart. Willie Garson, a friend who loved me at my worst, (and always let me know it) is gone. Goodbye, Fatty. I love you always."

Willie was in the midst of filming the ‘SATC’ spinoff, “And Just Like That...” earlier this summer.

He reprised his role as Carrie Bradshaw’s right-hand man, and the two of them along with actor Mario Cantone were photographed filming in New York City on July 24.

Willie and Mario's characters played frenemies turned husbands in the series and spinoff movies.

Their characters, Stanford and Anthony Marentino, got married in “Sex and the City 2,” after having a contentious relationship from seasons three through six.

Mario took to Twitter writing, "I couldn't have had a more brilliant TV partner. I'm devastated and just overwhelmed with Sadness. Taken away from all of us way soon. You were a gift from the gods. Rest my sweet friend. I love you."

His 'SATC' co-star Cynthia Nixon issued the following statement, "So deeply, deeply sad we have lost @WillieGarson. We all loved him and adored working with him. He was endlessly funny on-screen and and in real life. He was a source of light, friendship and show business lore. He was a consummate professional— always."

My heart goes out to his son, Nathen Garson. Nathen, I hope you know how much he loved you and how proud he was to be your dad.

Willie’s son, Nathen Garson, commemorated his dad in a heartfelt and emotional post.

He wrote, "I love you so much papa. Rest In Peace and I’m so glad you got to share all your adventures with me and were able to accomplish so much. I’m so proud of you. I will always love you, but. Think it’s time fro you to go on an adventure of your own. You’ll always be with me. Love you more than you will ever know and I’m glad you can be at peace now. You always were the toughest and funniest and smartest person I’ve known. I’m glad you shared your love with me. I’ll never forget it or lose it ❤️😘.”

Willie adopted Nathen in 2009 when he was 12-years-old.  When speaking about the adoption, he told People it was a joint decision.

“We had a smooth transition because we both wanted this adoption. Fatherhood is what I always wanted it to be,” the actor told the outlet. “I wanted it so badly and he wanted it so badly. I think often it can be difficult because it’s not that balanced.”

Willie has starred in movies such as “There’s Something About Mary,” “Freaky Friday” and “Walk of Shame.”

In addition to “Sex and the City,” he had TV roles in “White Collar” and “Hawaii Five-O.”

Rest In Peace, Willie.