Video: How WICKED Inspired Idina Menzel & Her Sister to Write Their New Children's Book

Tony Award-winner Idina Menzel and her sister, acclaimed writer and teacher Cara Mentzel, have released their new lyrical picture book, Proud Mouse. Watch a video of the duo on Good Morning America this morning discussing Proud Mouse. During the interview, Mentzel revealed how Menzel's performance as Elphaba in Wicked helped inspire the new book.

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