Delirious (1991) on Netflix

Jack is the head writer for a successful soap opera, and he's sweet on the show's star, lovely Laura. It's easy for everyone but Jack to see that she's playing him for a sap. But a conk on the head brings Jack some new insights - and some new powers. He finds himself in Ashford Falls, site of his fictional soap opera -- and everything he writes comes true! It's a fantastic opportunity to get Rachel, Laura's character, to fall in love with him. But life isn't easy even in the fictional world, and even when you're the author!