The only daughter of the late Senator Edward Kennedy, Kara Kennedy Allen, died suddenly Friday evening, NBC News has confirmed.
The 51-year-old mother of two teens died while at a health club in Washington, D.C.
Kennedy Allen had been a survivor of lung cancer and family friends say she had been in remission for a few years.
No further details about the circumstances of her death were available, but family members were told that a heart attack was suspected.
Eleanor Mondale, daughter of Walter Mondale, dies
Eleanor Mondale, the vivacious daughter of former Vice President Walter Mondale who carved out her own reputation as an entertainment reporter, radio show host and gossip magnet, has died at her home in Minnesota. She was 51.
Mondale family spokeswoman Lynda Pedersen said she died Saturday. She had been diagnosed with brain cancer years earlier.
Mondale had been off the air at WCCO-AM in Minneapolis since March 19, 2009, when she announced that her brain cancer had returned a second time. She had surgery to remove the tumor Aug. 12, 2009, at Mayo Clinic in Rochester, Minn., and a posting on her CaringBridge website declared the surgery a success.