'Mary Poppins Returns' Stars Emily Blunt and Lin-Manuel Miranda Share Big Dance Number Details

ET takes you behind the scenes of 'Mary Poppins Returns,' in theaters Dec. 19.

Watch TV shows, movies and more on Yahoo View.

About Entertainment Tonight

Entertainment Tonight is the No. 1 entertainment newsmagazine in the world and is seen as the foremost authority on breaking entertainment news since its debut. Over the years, ET has earned a reputation for covering the entertainment industry with unprecedented access to celebrities, film, television, music, fashion, award shows and special events. As the undisputed industry leader, ET is the authoritative source behind Hollywood's latest news. See More

Check out more stuff on Yahoo View