From Amitabh Bachchan to SRK, why do celebrities have personality rights?

There is no particular legislation that statutorily protects such rights, courts often rely upon other statutes to bestow this protection

Bitter towards her fiancé and missing her ex, Joan, a mid-level manager in a tech company, is your average Joan. Until she stumbles on Joan is Awful, the television show that retells the events of her life almost in real time. Using generative artificial intelligence (AI) and quantum computing, it has a virtual actor playing Joan, and revels in her darkest secrets and deepest fears.

Joan is Awful can get away with it because the platform on which it streams, Streamberry, had Joan sign its “terms and conditions”. This is the dystopian plot of the sixth season of Black Mirror