Which type of delusion has the individual believing they are in a romantic relationship with someone famous?

The type of delusion where an individual believes they are in a romantic relationship with someone famous is known as an erotomanic delusion. This specific delusional belief involves a conviction that another person, typically someone of higher status or fame, is in love with the individual or has a special relationship with them. It often leads to the person pursuing or fantasizing about romantic interactions, despite clear evidence to the contrary.

Erotomania can occur in the context of various psychiatric conditions, including schizophrenia or mood disorders. This delusion is characterized by the individual's strong and persistent belief regardless of the reality or feedback from the environment, which distinguishes it from more common beliefs or whims people may have in everyday life about romance or celebrity.