Cotillard sings, plays guitar, bass guitar, keyboard and tambourine.

She co-wrote and performed the song "La Fille De Joie" for her 2001 film Pretty Things (Les Jolies Choses), in which she played a singer and also performed the song "La Conne" for the film.
Canadian singer Hawksley Workman, said in interviews about his album Between the Beautifuls that he worked and wrote songs with Cotillard while they both were in Los Angeles during the 2007–2008 movie awards season.
In 2008, she co-wrote and performed the song "The Strong Ones" with Hawksley Workman for Olivier Dahan's short film for Cartier's Love range.
In 2010, Cotillard recorded the songs "Five Thousand Nights" and "Happy Crowd" with the French Rock band Yodelice for their album "Cardioid".
She also went on tour with the band in different cities in France and Belgium, under the pseudonym "Simone", which is her maternal grandmother's name.
In the same year, she appeared in the video "More Than Meets the Eyes" from Yodelice.

Cotillard recorded the song "The Eyes of Mars" with Franz Ferdinand especially for Dior.
In 2012, she wrote and performed the song "Lily's Body" for the fourth episode of the Lady Dior Web Documentary with the same title, and in 2014, Cotillard wrote and performed the song "Snapshot in LA" alongside John Cameron Mitchell, Metronomy's Joseph Mount and Villaine.
She also wrote and co-directed the video for the song, made for Lady Dior's advertising campaign "Enter the Game – Dior Cruise 2015".
Cotillard sings, plays guitar, bass guitar, keyboard and tambourine.
She co-wrote and performed the song "La Fille De Joie" for her 2001 film Pretty Things (Les Jolies Choses), in which she played a singer and also performed the song "La Conne" for the film. Canadian singer Hawksley Workman, said in interviews about his album Between the Beautifuls that he worked and wrote songs with Cotillard while they both were in Los Angeles during the 2007–2008 movie awards season. In 2008, she co-wrote and performed the song "The Strong Ones" with Hawksley Workman for Olivier Dahan's short film for Cartier's Love range. In 2010, Cotillard recorded the songs "Five Thousand Nights" and "Happy Crowd" with the French Rock band Yodelice for their album "Cardioid". She also went on tour with the band in different cities in France and Belgium, under the pseudonym "Simone", which is her maternal grandmother's name. In the same year, she appeared in the video "More Than Meets the Eyes" from Yodelice.
Cotillard recorded the song "The Eyes of Mars" with Franz Ferdinand especially for Dior. In 2012, she wrote and performed the song "Lily's Body" for the fourth episode of the Lady Dior Web Documentary with the same title, and in 2014, Cotillard wrote and performed the song "Snapshot in LA" alongside John Cameron Mitchell, Metronomy's Joseph Mount and Villaine. She also wrote and co-directed the video for the song, made for Lady Dior's advertising campaign "Enter the Game – Dior Cruise 2015".
Marion Cotillard