"Charlie's Angels" star Cheryl Ladd opened about being diagnosed with cancer while speaking to fans at the show's 50th anniversary celebration at PaleyFest LA on Monday.
Ladd revealed to the audience at the anniversary panel that she had previously been diagnosed with breast cancer and had undergone treatment for the disease, thanking her doctors and husband for their support throughout the ordeal.
She did not reveal the type of treatment she underwent or when she received her diagnosis.
The announcement means all three of the "Charlie's Angels" stars in attendance at the PaleyFest panel -- Ladd, Jaclyn Smith and Kate Jackson -- have been previously diagnosed with and treated for breast cancer.
ABC News reached out to a representative for Ladd for more information.
During the PaleyFest panel, held at the Dolby Theatre in Los Angeles, the stars celebrated five decades since their hit show turned into a nationwide sensation.
"Fifty years is a long time ... it really is," Smith said, speaking with ABC News' Chris Connelly at the Dolby Theatre.
Ladd called the event "a long overdue get-together."
Jackson called Ladd and Smith "my sisters," noting the show's run "feels like it was yesterday."
Added Ladd, "We were all such individual women, but women who really cared for each other -- and just as the show was, we were there for each other."
"Charlie's Angels" follows three glamorous crimefighters who are recruited to work as private investigators for the Charles Townsend Detective Agency, run by Charles "Charlie" Townsend (voiced by John Forsythe).
The series originally starred Jackson, Smith, and Farrah Fawcett, who was later replaced by Ladd in season 2. Shelley Hack later joined the show in season 4, after Jackson's departure, and was later replaced by Tanya Roberts in season 5.
"Charlie's Angels" ran for five seasons from 1976 to 1981.
In 2000, Cameron Diaz, Lucy Liu and Drew Barrymore took over the big screen for a film revival of the show, further growing its popularity. A sequel followed in 2003, starring Diaz, Liu, Barrymore and Demi Moore.
Kristen Stewart, Naomi Scott, and Ella Balinska starred in a subsequent film adaptation in 2019.
At Monday's 50th anniversary celebration, Connelly asked Ladd, Smith, and Jackson why they believe the show and its characters have maintained their popularity through the generations.
Jackson responded, "I wish somebody would tell us. I'd love to know."
Smith added, "We have women chasing danger instead of being rescued from it ... It gave women permission to step out of the mold."
