Nicholas Sparks Productions, the romantic novelist’s four-year-old film and television production company, is closing down, a spokeswoman for Sparks confirmed.

The company, which was based on the Warner Bros. lot, was set up to adapt movies and TV programming from Sparks’ novels.

Sparks headed the company with longtime publishing agent and creative collaborator Theresa Park. A total of 11 of his 18 novels have been made into movies, led by 1999’s “Message in a Bottle,” 2004’s “The Notebook” and 2010’s “Dear John,” which all topped $100 million at the worldwide box office.

Sparks was a producer on his last four films: 2013’s “Safe Haven” for Relativity, 2014’s “The Best of Me” for Warner Bros., 2015’s “The Longest Ride” for Fox and 2016’s “The Choice” for Lionsgate. “The Choice” underperformed at the box office with $18 million domestically.

The production company also signed an overall deal with Warner Horizon Television in 2015 to create TV series. The company is developing a TV show for the CW based on “The Notebook.”

Sparks’ next book, “Two by Two,” will hit bookstores in October.