The fashion house, headed by designer Alber Elbaz, will aim at girls between the ages of four and 10, and include dresses, T-shirts, coats and accessories, reports femalefirst.co.uk.
"It's a way to translate the universe of Lanvin ready-to-wear to the world of kids. We really want to stay in the luxury world," said Thierry Andretta, Lanvin's executive vice-president.
The junior collection will debut at the same time as the resort collection, which will be unveiled in the summer and placed on sale in November.