Adult granulosa cell tumors are uncommon ovarian tumors mainly diagnosed after the age of 30, and the average age is roughly 55. Very few cases are associated with endometrial carcinoma. Most of these cases are well-differentiated endometrioid adenocarcinoma with excellent prognosis if found early. Heavy, irregular menstrual bleeding and postmenopausal bleeding are frequent and are caused by endometrial shedding due to unopposed estrogen action for a prolonged period of time.A 65-year-old female para 4, live 4 (P4L4) came with postmenopausal bleeding for six months. Various investigations were done, which revealed endometrial cancer type 1. A staging laparotomy was performed, which showed a right hemorrhagic ovarian mass; on a frozen section, it came to be a granulosa cell tumor.The rare association between granulosa cell tumor and endometrial carcinoma can be diagnosed with a good correlation of clinical, histopathological, and radiological findings.