Juvenile ovarian granulosa cell tumors (JGCTs) are described infrequently in pediatrics, and their finding in prepubertal patients is exceptional. Most of the tumors are benign, but recurrences up to 4 years of follow-up have been described. We present 2 cases of JGCT in infants: 1 with late recurrence of bilateral ovarian JGCT and 1 in a newborn with Ollier disease. Clinical diagnosis and treatment of JGCT are revised.