One thing to note, with the special airing of The Untold Mary Poppins Story on November 27, ABC’s usual Wednesday night lineup, including Abbott Elementary season 4, will not be airing any new episodes. Again, The Untold Mary Poppins Story: A 20/20 Special Edition airs at 9 pm ET/PT on Wednesday, November 27.

ABC will air the special on Wednesday, Nov. 27, to celebrate the 60th anniversary of the classic film "Mary Poppins."

Julie Andrews, Dick Van Dyke and others celebrate the lasting legacy of "Mary Poppins" on the 60th anniversary of the Disney classic.

An ABC News two-night event celebrates the Disney classic and chronicles the film's turbulent flight from children's book to the silver screen.

To celebrate the 60th anniversary of beloved Disney classic “Mary Poppins,” a new “20/20” special will feature rare footage, new stories, a new Sherman Brothers verse and new interviews from the film’s living legends.