[3] Born to two university professors, Boyer spent his childhood in Sèvres and in Ville-d'Avray in the Hauts-de-Seine region.

[11][12] In the 2017 legislative elections, Boyer unsuccessfully ran as an LR candidate in Hauts-de-Seine's 8th constituency, losing against Jacques Maire.

[15][16] He also serves on the five-member Advisory Committee on the Conduct of Members, the parliament’s body responsible for assessing alleged breaches of its code of conduct and advising the President of the European Parliament on possible action to be taken,[17] In addition to his committee assignments, Boyer is part of the MEPs Against Cancer group.

[18] In May 2022, Boyer – together with Stéphane Séjourné for Renaissance and Patrick Mignola for the Democratic Movement (MoDem) – negotiated the agreement leading to the creation of Ensemble, a coalition of the parties forming the presidential majority, including on the financial distribution between them.

[19] In 2019, Boyer had to publicly apologize for using what he called “an ill-chosen word” after saying mayors who refused to fall into line would be considered Emmanuel Macron’s “enemies” at the time of the 2022 presidential election.