Maureen McCormick was taken completely by surprise upon hearing about Florence Henderson's death.

McCormick, who played Marcia Brady on the classic sitcom The Brady Bunch to Henderson's matriarch, Carol Brady, was very close with her TV mom over the years. The actresses had just seen each other three days before Henderson's passing, with Henderson showing up at the Dancing With the Stars finale to support her.

"Just total disbelief ... I had just been with her. I had just seen her. I think everyone was just shocked," McCormick admitted to Entertainment Tonight, when asked about her reaction to Henderson's death.

"She was an incredible example of how to life your life," McCormick noted.

Henderson kept up her youthful spunk even in her later years, competing on her own season of Dancing With the Stars back in 2010. She maintained a relationship with McCormick, which the latter continues to treasure.

"Florence played our mother on the show, but I always felt like she was more of a sister," McCormick said. "She was so young at heart, and just a really good friend. ... Throughout my life, she has been a huge supporter in my hard times. She never gave up on me. She always just believed in me and gave me hope and strength. She gave that to everybody - it was so genuine and so pure and so loving and so from her heart."

McCormick also tweeted about Henderson when the news was revealed to the world:

Henderson was surrounded by family and friends as she passed away on Nov. 24, having been hospitalized the day before. The actress died of heart failure, though she reportedly showed very little signs of sickness prior to her hospitalization, with her manager, Kayla Pressman, admitting, "We are all in a state of shock."