If the name isn't immediately familiar, he was a lead actor in the double Oscar-winning film (Best Foreign Language film, Best Original Screenplay) “A Man and a Woman” ("Un Homme et une Femme") (1966).
Some facts about
him from the first linked-article below:
" ... appeared in more than 100 films. He was one of France’s premier actors in the post-war era."
"France’s national Cinematheque museum called him “one of the greatest actors in the history of French cinema.”
" ... star[ed] with Brigitte Bardot in “And God ... Created Woman” in 1956."He was also a noted amateur race car driver.
https://abcnews.go.com/entertainment/wirestory/french-film-titan-trintignant-man-woman-dies-85465911Of course the film is also remembered for its haunting and romantic theme melody of the same name as the film. Here's an original trailer of the film, with strains of that melody:
https://www.bing.com/videos/search?q=man+and+a+woman+1966+site%3awww.youtube.com&view=detail&mid=cf6e6a225340b447792ccf6e6a225340b447792c&form=vireRest in peace, Jean-Louis.