As the Emmy Award-nominated actress revealed, Larry David and fellow creators swear by a highly unconventional creative methodology, strongly encouraging the stars to engage in improvisation sessions and come up with their own take on the already-existing scenes. Their insistence on spontaneity knows no bounds — so much so that the actors are often required to come up with brand new material on the spot.
“None of the guest stars get the outlines,” explained Susie Essman during the panel discussion at 92nd Street Y.
“We get the outlines but there’s an outline, a 7-page-long outline and there’s maybe a paragraph about what each scene is about. But there’s no dialogue written. It will just say ‘Larry and Jeff are eating at a Palestinian chicken restaurant talking about how great the chicken is.’ The story is there, but there is no dialogue,” Sussie added.
Source : https://www.distractify.com/p/is-curb-your-enthusiasm-improvised