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ST. LOUIS (KSDK) - It's a soap opera seen around the world. "Days of Our Lives" airs at 1 p.m. weekdays on NewsChannel 5, and has been on the air since 1965.

Two of its biggest stars, Ari Zucker and Bryan Datillo, joined First @ 4 Monday.

You may know the pair better as Nicole Walker and Lucas Horton, and you can meet them Monday night at the Barnes & Noble in Des Peres. They will be signing copies of their new book, Days of Our Lives: Better Living at7 p.m.

Click the video player above to learn more about the book.

On Monday morning, Zucker and another co-star, Shawn Christian, joined Today in St. Louis, and even worked in the NewsChannel 5 mailroom.