- Griffin has shaved her head in solidarity with her sister
- She lost a brother to cancer in 2014
On Monday, writer Yashar Ali tweeted photos of Griffin with her new look.
"In solidarity with her sister, who is going through chemo, @kathygriffin shaved her head," the tweet read. "Donate to @AmericanCancer."
In one of the photos, Griffin is joined by her mother, Maggie Griffin.
The elder Griffin retweeted Ali's tweet and wrote "My daughter Kathleen Mary is a wonderful human being."
The comedienne is one of five Griffin children and in 2014 her brother Gary died of cancer.
"Our last real conversation, w my brother I loved so much, was just a few days go when I got him this signed picture from his idol, @JoeWalsh," Griffin wrote in 2014 in an Instagram tribute to her brother. "He loved the Eagles, 70s rock, The Chicago White Sox and the Xavier "muskies"... Oh & he was funny as sh*t."