The audience at the Broadway production of "The Lion King" got more than they bargained for when Elton John took to the stage to perform his song "Circle of Life".

Sir Elton was joined by the entire cast of the show who sang with him, to mark the production's twentieth year on Broadway.

Disney's groundbreaking animated film version of "The Lion King" first appeared in cinemas in 1994.

Now, life action and CG adaptation is in the works, featuring Donald Glover as the voice of Simba and Beyonce as his love interest, Nala.