"1 in 8 women get breast cancer. Today, I'm the one," The 56-year-old wrote.
Just when you thought... pic.twitter.com/SbtYChwiEj— Julia Louis-Dreyfus (@OfficialJLD) September 28, 2017
"The good news is that I have the most glorious group of supportive and caring family and friends," she added. "The bad news is that not all women are so lucky, so let's fight all cancers and make universal health care a reality."
The "Veep" star and executive producer won her eighth individual Emmy Award, tying the record in the distinction with Cloris Leachman, and her sixth consecutive Emmy for her starring role on "Veep" -- the most of any performer for one role.
HBO released a statement saying:
Our love and support go out to Julia and her family at this time. We have every confidence she will get through this with her usual tenacity and undaunted spirit, and look forward to her return to health and to HBO for the final season of VEEP.
Former Vice President Joe Biden and the Northwestern University basketball team were among the many others showing their support for Louis-Dreyfus.
We Veeps stick together. Jill and I, and all of the Bidens, are with you, Julia. pic.twitter.com/JP0c2wtrJ6— Joe Biden (@JoeBiden) September 28, 2017