Dr. Spencer played the wisecracking Dee Thomas on the 1970s sitcom “What’s Happening!!” and became a veterinarian later in life.

Pelt watched Spencer, 60, take her last breath. “August 11, 2025 will forever be a reminder of the day that I lost a big part of myself,” he said. “After many years, my big sister, Dr. Danielle Louise Spencer lost her battle with cancer.

Former child star Danielle Spencer, who brought sass as little sis Dee in the 1970s sitcom 'What's Happening!!,' died Monday after battling cancer. She was 60.