[2][3][4] Garin was born in Salvador, Bahia, the daughter of a French father and a Brazilian mother.

Following a period with Théâtre du Soleil in Paris,[7] Laila worked in "Grease" in São Paulo and went to Rio de Janeiro in 2009, where she starred in the show "Eu te amo mesmo assim", directed by João Sanches and supervised by João Falcão.

At the age of 15, she was part of an amateur theater group at Casa Via Magia, and performed in plays such as "Romeo & Juliet and Caetano", with fragments of Shakespeare's work and songs by composer, "A Casa de Eros" (1996), "Medeia" (1997), "Roberto Zucco" (1998) and "Lábaro Estrelado" (1999).

Laila gained an international audience when she appeared in the popular Netflix Sci-fi series "3%" (2016) as the character Marcela Álvarez.

In January 2022, she released a single with Chico César, "Vermelho Esperança", written by him and taken off the soundtrack for the theater play A hora da estrela – O canto de Macabéa, which happened in 2020 and was inspired by Clarice Lispector's Hour of the Star.