American Idol' star Ryan Seacrest and his sister, Meredith Seacrest Leach, reveal all about their children's book 'The Make-Believers' to Good Housekeeping.

Ryan Seacrest may not have expanded his own family just yet, but he is a doting uncle to his niece Flora, his younger sister Meredith Seacrest Leach's daughter. The American Idol host and his sister are super close,