As Hero Fiennes Tiffin also points out, the After author Anna Todd is quite involved in the production process, giving the actors an extra resource into the source novels. Todd is a producer on the film, and this time around, she co-wrote the screenplay with Mario Celaya. After We Collided is also directed by Roger Kumble, who helmed Cruel Intentions back in 1999.
Article source: https://www.cinemablend.com/news/2557460/josephine-langford-and-hero-fiennes-tiffin-have-very-different-relationships-with-the-after-series