Charlie Sheen 's documentary is resonating with more than just fans ... his own daughter is blown away by the new flick, especially after learning his motivation to get sober.

Check it out ... Sami Sheen posted to her TikTok after watching Charlie's 2-part Netflix documentary, "aka Charlie Sheen," and fought back tears after taking in her father's many truth bombs.

Specifically, Sami noted it was news to her that her famous dad decided to get sober for his kids ... a revelation that understandably moved her.

She went on to praise the flick further in the caption, writing ... "honestly a 10/10 documentary."

This is a major update for the father-daughter duo, who've been estranged for some time. Remember, Sami put her dad on blast in April, after sharing she hadn't spoken to hi

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