Mellie Uyldert (31 May 1908 in Blaricum – 10 May 2009 in Bilthoven) was a female Dutch New Age writer, alternative healer, occultist, and astrologer who published about 30 esoteric books, selling over a million copies, making her a recognized person in the Netherlands.
Of a conservative, peculiar, poetic, eccentric character, she was also controversial because of several unsettling claims that caused antagonism.
In the 1970s she became a celebrity on Dutch television.
Her publications cover fairy tales, herbal medicine, stones, metals, health, and gnomes.