Kathy Griffin emotionally celebrates what would have been her late mother's 100th birthday

Kathy Griffin's late mother, Maggie, would have become a centenarian on Wednesday. The stand-up comic marked her mother's 100th birthday in a bittersweet tribute.

"It was just in March that our beautiful, hilarious and spontaneous Maggie Griffin passed away," the 59-year-old wrote on Instagram post, which included a photo of her mother joyfully smiling and waving. "She would have been 100 years old today. Happy Birthday, Mom."

Griffin ended the caption with two broken-heart emojis.

Several of the "Suddenly Susan" star's famous friends, such as Kris Jenner and Carson Kressley, left sweet birthday wishes for Maggie.

Editor’s Picks

Vanessa Bryant reveals tattoos honoring Kobe and Gianna

Garth Brooks drive-in concert coming to over 300 locations

'Queer Eye' host Tan France becomes US citizen, promises to vote for 'change'

The elder Griffin became a fan favorite on her daughter's Bravo reality show, "Kathy Griffin: My Life on the D-List," for her snarky humor and ultra-endearing, down-to-earth personality.

On March 17, Kathy broke the devastating news that her mother passed away.

"I am gutted. She was my best friend. She was my family. You knew her. She appreciated you guys so much. I'm shaking. I won't ever be prepared," she wrote at the time. "I'm so grateful you got to be part of her life. You loved her. I know it. She knew it. She's irreplaceable."