This volume constitutes the post-workshop proceedings of the First International Workshop on Formal Methods – Fun for Everybody, FMFun 2019, held in Bergen, Norway, in December 2019. The 7 revised full papers and 2 revised short papers presented in this volume were carefully reviewed and selected from 15 submissions. A white paper and two keynote papers are also included. The papers explore ways of utilizing the pathway to transforming and spreading formal methods. The vision of this workshop series is that formal methods ought to be taught in such a way that every student can have fun with it.