After news came of Ferrell not pursuing the project Friday, he tweeted: \"Thank you for taking the right path.If u want to know more about the decease contact myself or Patti.\"

Thankyou for taking the right path.If u want to know more about the decease contact myself or Patti. https://t.co/GGAVV8fyoR

— Michael Reagan (@ReaganWorld) April 29, 2016

Reagan's daughter and Michael's half-sister, author Patti Davis, also spoke out Thursday when news initially broke, posting an open letter on her website directed at Ferrell.

\"Perhaps you have managed to retain some ignorance about Alzheimer’s and other versions of dementia. Perhaps if you knew more, you would not find the subject humorous,\" she wrote.

She recalled, \"I watched as fear invaded my father’s eyes -- this man who was never afraid of anything. I heard his voice tremble as he stood in the living room and said, 'I don’t know where I am.' I watched helplessly as he reached for memories, for words, that were suddenly out of reach and moving farther away. For ten long years he drifted -- past the memories that marked his life, past all that was familiar ... and mercifully, finally past the fear.

\"There was laughter in those years, but there was never humor,\" Davis added.

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