You can pretend to be serious by you can’t pretend to be witty. Sacha Guitry
Alexandre-Pierre Georges “Sacha” Guitry (21 February 1885 – 24 July 1957) was a French stage actor, film actor, director, screenwriter, and playwright of the boulevard theatre. He was the son of a leading French actor, Lucien Guitry, and followed his father into the theatrical profession. He became known for his stage performances, particularly in boulevardier roles. He was also a prolific playwright, writing 115 plays throughout his career. He was married five times, always to rising actresses whose careers he furthered. Probably his best-known wife was Yvonne Printemps to whom he was married between 1919 and 1932.