Julie Andrieu was born in Paris, the daughter of actress Nicole Courcel and the cousin of writer Marc Levy. She has a half-brother and a half-sister from her father's side. She is also the cousin of actress Cathy Andrieu.
She started her career at age 18 as a photographer for France Soir. At age 20, she learnt to prepare small dishes to please her partner, the photographer Jean-Marie Périer. She published in 1999 her first cookbook titled La Cuisine de Julie and became in 2000 a food critic for the Guide Lebey.
Since 2001, she has hosted several radio and television programs on cooking:
- Tout un plat, program on channel Téva, 2001
- Votre table, program on radio RMC Info, 2002
- Julie autour du monde, program on channel Cuisine+, 2003
- Julie cuisine, daily program on channel TF1, 2004–05
- Droit dans le buffet, weekly program on radio Europe 1, 2005
- Fourchette & Sac à Dos, weekly program on channel France 5, 2007
- Côté cuisine, daily program on channel France 3, 2009
Since September 2009, she has been a food columnist in the daily television program C à vous presented by Alessandra Sublet on France 5, preparing almost every evening a recipe during the show. In 2012, she replaced Alessandra Sublet during her pregnancy by hosting the program every Friday.
She also collaborates on the weekly television magazine Télé 7 Jours for the rubric À table. She has published a number of books of recipes and cooking advices, created her own website and produced several television program titled Julie chez vous, where she visits individuals to make an inventory of their closets, advise and develop a recipe with the material they have.