Álvaro de Laiglesia was born in San Sebastián on the country's north Atlantic coast, although the family base at this point was still in Madrid. He was one of three brothers. There were also two sisters. The family into which he was born was a prosperous one, with a holiday home at :es:Monte Igueldo|Monte Igueldo. His grandfather had been among the founders of Spanish Credit Bank. However, during the build-up to the outbreak of the Spanish Civil War, the family fortunes went into a sharp decline, with the result that Álvaro de Laiglesia's upbringing involved several house moves to ever smaller apartments and changes of school. The family's art collection was replaced by a series of bare nails sticking out of the wall where the paintings had once hung. The king with whom his father had shared a passion for pigeon racing went into exile in 1931. During the Civil War he grew up with his mother and two sisters in San Sebastián while much of the city was destroyed in the fighting. Laiglesia's earliest writing was for the satirical magazine "La Ametralladora", which had been founded by Miguel Mihura. He was only 16 when he began contributing. The family nevertheless felt that he needed a more secure career, and after the war ended he was sent to work with the Bank of Spain. However, he only lasted at the bank for a hundred days after which, keen to see something of the world, he jumped on board a steamer sailing to Havana. In Cuba his friend Pepín Rivero managed to get him a job with the Diario de la Marina, with a weekly salary of ten pesos. He returned from Cuba in March 1941. In Spain he switched to the daily newspaper :es:Informaciones|"Informaciones" and was then, in 1942, a co-founder of the weekly news magazine :es:La Codorniz|"La Codorniz", committed, according to its motto, to producing "the boldest humour for the most intelligent reader". Starting in 1944, he would be the managing editor of this publication for 33 years. Laiglesia was a prolific and, in his time, popular novelist. His most notable works include "Un náufrago en la sopa", "Todos los ombligos son redondos", "Yo soy Fulana de Tal", "Réquiem por una furcia" and "Una larga y cálida meada". He collaborated with Miguel Mihura to write the stage play "El caso de la mujer asesinadita". He also composed a number of comedy screen plays for television, including "Consultorio", "El tercer rombo", "Historias Naturales" and "Animales Racionales" with Antonio Casal and Manolo Gómez Bur.