"Lyle and I last spoke in 2018 and I’m so glad we had the chance to catch up," Carter recalled in her touching post. "We talked about how lucky we both were to be surrounded by such wonderful family and friends. I will miss you, Lyle."
The veteran actor died peacefully on Tuesday morning, after a brief illness. He was 84.
Apart from his role on Wonder Woman, Waggoner was also known for his seven seasons starring on The Carol Burnett Show. The actor also hosted the syndicated quiz show, It's Your Bet, in the 1970s and played himself on an episode of That '70s Show in 1999.
Outside of his acting career, Waggoner made a mark on Hollywood with the 1979 launch of Star Waggons, which rented motor homes for actors, makeup departments and more to use on film and TV sets.
Waggoner is survived by his wife, Sharon Kennedy, and two sons, Beau and Jason.