Lara's first musical composition was "Marucha", written in honor of one of his first loves. In 1927 he already was working in "cabarets". It was around this time that he was involved in an argument with a showgirl named Estrella, who slashed him in the face with a broken bottle, leaving a distinct scar (a Glasgow smile) on his cheek. He subsequently moved to Puebla, but returned to Mexico City in 1928. That same year he started working for the tenor Juan Arvizu as composer and accompanist. In September 1930, Lara began a successful radio career. At the same time he acted and composed songs for such films as "Santa".