[4] His parents had met in 1915 in La Spezia, where Silvio Uderzo was recovering after being wounded while serving in the Royal Italian Army during World War I. Uderzo's mother, Iria Crestini, was working in the arsenals of La Spezia, along with many young Italian women at the time.

The additional fingers were surgically removed early in childhood as a precaution, as the infant Uderzo would sometimes violently pull on them when enraged or annoyed.

Here, Uderzo experienced elements of xenophobia against Italian immigrants during his childhood, even though he gained French citizenship in the year 1934.

Uderzo at one particular point became the target of the anger of a victim of Italian-German bombardment in the Spanish Civil War, and said a man spat in his face.

However, apart from the occasional ethnic resentment against Italians, Uderzo viewed his childhood and education in Clichy-sous-Bois fondly in retrospect.

Most of his siblings also shared certain artistic talents, and their mother used sheets of paper and pencils to give the children, especially her oldest son Bruno, something to do.

At the same time, he came in contact with the American comic and animated cartoon cultures, particularly with the early works of Walt Disney like Mickey Mouse and Donald Duck.

The family moved to the Rue de Montreuil in the 11th arrondissement of Paris in October 1938, changing both schools and the social vicinity.

From then on, Uderzo would use labels on his colors, but as he mostly stuck with black-and-white sketching, it would not make a huge impact on his artistic career either way.

The two men quickly became good friends, and decided to work together in 1952 at the newly opened Paris office of the Belgian company, World Press.

[9] In 1959 Goscinny and Uderzo became editor and artistic director (respectively) of Pilote magazine, a new venture aimed at older children.

[14] After Uderzo fired Sylvie and her husband in 2007 as managers of his estate and agreed to sell his share of Éditions Albert René to Hachette Livre, Sylvie accused him in a column in Le Monde, that with this sale to a corporation it was "as if the gates of the Gaulish village had been thrown open to the Roman Empire".

His son-in-law Bernard de Choisy said the heart attack was not linked to COVID-19, and that Uderzo had felt very tired for several weeks prior to his death.