X-Men: First Class was a pivotal role for the actor, and he would reprise the role in three sequels that would be released over almost a decade. Nicholas Hoult had just hit his twenties when the franchise began, and the cast became a family – Hoult even dated his fellow blue co-star, Jennifer Lawrence, for four years during the experience. Apparently, it wasn’t that awkward after they broke up, and they continued making movies together as an on-screen couple.
Article source: https://www.cinemablend.com/news/2496357/x-mens-nicholas-hoult-had-to-audition-for-beast-as-a-family-guy-character