Kathy Griffin's Sister Joyce Dies After Battle with Cancer

Kathy Griffin is saying farewell to her sister, Joyce.

“My sister Joyce passed away peacefully last night,” Griffin wrote in the caption. “Check out this beautiful moment. Please support American Cancer Society Society here: goo.gl/eMJVhq (Link In Bio).”

In July, Griffin shaved her head to stand in solidarity with her sister who was undergoing chemotherapy at the time.

A series of photos appeared on social media showing the star with no hair. In one photo, Griffin posed alone and topless while grinning and holding her bare head.

In the second photo, Griffin sits beside her mom, Maggie Griffin, who covers her mouth in surprise after seeing the gesture the comedian did in honor of Joyce. Maggie later tweeted that her daughter “Kathleen Mary is a wonderful human being.”

It is not clear what type of cancer Joyce was suffering from.

In 2014, the star’s older brother, Gary, passed away from stage-four esophageal cancer at the age of 63. “This AM my brave brother Gary Griffin passed away in palliative care after a brutal struggle w cancer,” she wrote on Instagram after his passing. “Oh & he was funny as s—.”