Julia Louis-Dreyfus arrives at the 69th Primetime Emmy Awards in Los Angeles. Louis-Dreyfus says she has been diagnosed with breast cancer.

Julia Louis-Dreyfus arrives at the 69th Primetime Emmy Awards in Los Angeles. Louis-Dreyfus says she has been diagnosed with breast cancer.

Richard Shotwell/Invision/AP

Actress Julia Louis-Dreyfus revealed on Twitter that she has been diagnosed with breast cancer. 

Perhaps best known for her roles on Veep and Seinfeld, Dreyfus made the announcement Thursday, tweeting "1 in 8 women get breast cancer. Today, I'm the one." 

A spokeswoman for Louis-Dreyfus confirmed to The Associated Press that the posts were authentic.

Louis-Dreyfus, 56, received her diagnosis just one day after winning an Emmy Award for best actress in a comedy series on Sept. 17.

HBO said in a statement that Louis-Dreyfus' diagnosis had no bearing on the decision to renew Veep for its final season: 

"The writers will continue prepping as business as usual, and HBO will adjust the production schedule as needed," the statement read. "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.'" 

In her tweet, Louis-Dreyfus wrote: "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." 

Actress Christina Applegate replied to Louis-Dreyfus' tweet, saying "Mama, find me. Let's talk if you want." In 2008, Applegate learned that she had breast cancer and later underwent a double mastectomy.

According to the Centers for Disease Control and Prevention, breast cancer is the most common cancer in women no matter the race and the most common cause of death among Hispanic women.

Louis-Dreyfus' publicist told AP that no further details about her condition would be provided at this time, but added that the actress is "incredibly grateful for the outpouring of support and well-wishers."

Actor John O'Hurley played J. Peterman on Seinfeld and shared several scenes with Louis-Dreyfus, whose character Elaine Benes worked for Peterman as a copy writer.

"Not since Lucille Ball has there been a more gifted comedic actress, nor a more caring human being," O'Hurley wrote in a text message. "I firmly believe God still has plans for her, and this is no more than a hiccup in Elaine's Dance Card."

Updated at 2:55 p.m.: Revised to include comments from actor John O'Hurley.

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