Any performance done without preparation is called an impromptu performance. Impromptu means "on the spot" or without preparation.
What is the gender for a man who performs a courageous act
ad-libs
An actor (actor or actress) will perform a role as a character in a play on a theatre's stage.
Jake Epstein is the actor that plays Craig Manning. For a little background info, his full name is Jacob Lee Epstein and he is Jewish. He writes songs and performs, and has had many bands growing up.
Akshay Kumar is an actor of Indian Origin. He is a down to earth person. He is adventurous as performs his stunts himself.
impromptu
improvise
Improvisation
Carried out or performed with little or no preparation; impromptu.
In the inter-phase preparation for division stage, the cell increases it's own size and copies it's own DNA. The inter-phase is referred to as the living phase of the cell and where the cell performs all of it's duties.
Rezophonic
It is known as an ad-lib or ad-libbing.This is when an actor adds his own words to the script without preparation, without rehearsal.