The immense popularity of the new romantic comedy “Anyone But You” has led some critics to hail the start of a rom-com renaissance. The film was a box office success, earning more than $200 million globally, and has begun trending on social media. It has even started a TikTok trend featuring the end credit song “Unwritten” by Natasha Bedingfield, which has made the Billboard Top 20 in the U.K. for the first time in 19 years.