While it's most likely you're asking about the (which includes a book, two movies, and a TV show), I have provided a review for the 2021 rom-com as well just in case. Option 1: The 2021 Romantic Comedy (Film)
It's generally seen as a charming but flawed entry in the genre. The Right One
This is a critically acclaimed 2004 novel by John Ajvide Lindqvist, most famous for its 2008 Swedish film adaptation. Movie Review: “The Right One” goes a tad too wrong While it's most likely you're asking about the
Reviewers at MamasGeeky praised Nick Thune’s performance, noting he does a "fantastic job" embracing different personalities. The chemistry between the leads is often cited as the movie's saving grace. Movie Review: “The Right One” goes a tad
This film stars Cleopatra Coleman as Sara, a writer with writer's block, and Nick Thune as Godfrey, an "oddball" who deals with his past by constantly adopting new personas.
A light, hour-and-a-half watch that’s "super fun" for fans of the genre but doesn't break much new ground. Option 2: " Let the Right One In " (Vampire Horror)