Actress Mary-Kate Olsen was born on June 13, 1986, in Sherman Oaks, California. The daughter of mortgage banker David Olsen and manager Jarnie Olsen, Mary-Kate and her twin sister, Ashley, have become among the most popular—and bankable—female personalities in America. They made their acting debut in 1987 at 9 months old, sharing the role of the youngest daughter, Michelle Tanner, on the ABC family sitcom Full House. The series ran for eight years, during which the Olsen twins' career took off. By the age of 12, the girls had starred in home videos, feature films, multi-media entertainment and another ABC TV series, Two of a Kind. Under the name Dualstar Entertainment, they produced several straight-to-video movies, a line of musical detective videos entitled The Adventures of Mary-Kate & Ashley, and the hugely successful You're Invited to Mary-Kate and Ashley's party tapes. They have also introduced a series of companion books.
Devra Newberger Speregen has written more than 100 books, including young adult fiction, non-fiction, puzzle books, activity books, and nearly 30 biographies for young people. Speregen serves as a regular contributor to Young Judea Magazine and BabagaNewz Magazine.