Julia Louis-Dreyfus says she has been diagnosed with breast cancer.

The star of Veep and Seinfeld posted word of her illness Thursday on social media. A spokesperson for Louis-Dreyfus confirmed the posts were authentic.

On her Twitter account, the actress wrote that one in eight women get breast cancer.

“The good news is that I have the most glorious group of supportive and caring family and friends, and fantastic insurance through my union. The bad news is that not all women are so lucky, so let’s fight all cancers and make universal health care a reality,” she tweeted.

The actor’s publicist said no further details about her condition would be provided at this time, adding that Louis-Dreyfus “is incredibly grateful for the outpouring of support and well wishes.”

She won her sixth Emmy Award this month for Veep.