You Won't Believe How Much the World's Richest Heirs and Heiresses are Worth

Maggie Gyllenhaal, $15 million

Actress Maggie Gyllenhaal is the sister to Jake Gyllenhaal and has just as an impressive filmography. She also appeared in Donnie Darko and had roles in Secretary and The Dark Knight, the latter of which propelled her into fame. She appeared in the Broadway hit "The Real Thing" as well.

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