Brochu grew up in Pointe-Claire, a suburb of Montréal, Canada. Her native language is French, but she also spoke English from an early age. Growing up she had anglophone friends and learned English at Jean XXIII High School in Dorval, Quebec. She studied drama at the Cégep de Saint-Laurent. In 2005, Brochu graduated from the Conservatoire d'art dramatique in Montreal. She says a key turning point in learning English was when she became an avid viewer of The Fresh Prince of Bel-Air as a child. Her father left when she was 1 1/2 years old and, when her father later remarried, she found herself with a step-sister. Brochu has stated that she has a good relationship with her stepmother. Her mother is a violoncello teacher and her father worked as a taxi driver. While out cycling, she was hit by a truck and was told by her doctors that to keep her knee in good shape she could no longer run or dance. She stopped both and took up yoga and acting.
Career
Some of her most prominent French-speaking roles include: Chloé in Inch'Allah, Rose in Café de Flore, Sara in Tom at the Farm, and Stéphanie in Polytechnique. In 2013, she became well known for her English-speaking role as Delphine Cormier, a French scientist on the hit TV series Orphan Black. Brochu has recently finished portraying Aurora Luft in CBC Television's spy thrillerX Company. Brochu also has a successful singing career. She released a duet with Félix Dyotte entitled "C'est l'été, c'est l'été, c'est l'été", in 2016, as well as appearing on Dyotte's 2017 album Politesses on the song "Je cours", and has released a solo single entitled "Quoi". In September 2019 Brochu in cooperation with her longtime friend, Félix Dyotte, released her first music album called Objets Perdus.
Personal life
She previously dated Canadian actor François Arnaud, however in a May 2014 interview she stated that they were no longer together. Her cousin is Xarah Dion, a French-Canadian singer. In February 2015, Brochu stated in an interview that she is a feminist and that she struggled when portraying Aurora Luft in X Company:
There was a moment in Episode 2 when I was with , when I have to give him orders, I don’t want to do that, and he doesn’t want me to do that, and my first instinct, as a woman, was to smooth it out for him. The director was like, no, you’re a sergeant now. You have to give orders. You have authority. I'm a feminist, it’s 2015.
She resides in Montréal, Quebec. Brochu is fluent in English and French but can also speak Spanish well. She can perform contemporary dance and yoga. Brochu also has musical talents which include being able to play the drums, guitar and piano as well as singing mezzo-soprano and alto. In June 2018 she confirmed her pregnancy with a picture on her Instagram account with her boyfriend Nicolas Schirmer. Their son, Laurier, was born on October 6, 2018.
