Granulosa cell tumours (GCT) belong to the group of sex cord and stromal tumours of ovary. Adult granulosa cell tumours account for approximately 1% of all ovarian tumours and 95% of all granulosa cell tumours. They are found more often in postmenopausal than premenopausal women, with a peak incidence between 50 and 55 years of age. We present the case of a 35-year female who came with white discharge, irregular menses and excessive bleeding during menses since 5 to 6 months. The complete blood picture with peripheral smear examination, kidney and liver function tests were all within normal limits. CT abdomen was advised which revealed a large solid cystic lesion of left ovarian origin. Surgical intervention was done and histopathology revealed adult granulosa cell tumor of ovary.