Applegate will be seen later this year in film comedy The Rocker
US actress Christina Applegate has been diagnosed with an early form of breast cancer, according to her publicist.
Ame Van Iden said: "The cancer is not life threatening. She is following the recommended treatment of her doctors and will have a full recovery."
The 36-year-old is best known for her role as Kelly Bundy in the long-running US sitcom Married with Children.
Last month she was nominated for an Emmy award for her current role as an amnesiac in TV comedy Samantha Who?
Applegate also received a Golden Globe nomination for the show, in which she plays a woman who awakens from an eight-day coma remembering nothing about her past.
The actress, whose films include Anchorman and The Sweetest Thing, is scheduled to appear next month on a TV fund-raiser in aid of cancer research.
Meryl Streep, Jennifer Aniston and Charlize Theron will also appear on the telethon, to be aired simultaneously on US networks CBS, NBC and ABC.
Christina Applegate on women in Hollywood
Applegate played Aniston's sister in two episodes of Friends, for which she won an Emmy for best guest appearance.
Applegate's publicist said she had benefited from early detection through an MRI ordered by her doctor.