Again, this is the standard agreement generally used in most real estate transactions. It is a formal proposal, usually drafted by your real estate agent or broker along with you. If the Seller agrees to all of the terms and conditions in the contract, they will simply sign the document. It then becomes a legally_binding contract between Buyer and Seller.
Actors are paid to act; any agent can tell you that the script is the least important part to them. When it comes to the principal cast (which the sales and financing are predicated), unless I can call the agent or manager directly myself and verify, there is no real attachment. The exception being a Spielberg or a Scorcese whose stature in the industry could reasonably facilitate any star interest.