HighlightsDuplication of gallbladder is a rare congenital anomaly that requires special attention.Preoperative diagnosis can be challenging to the surgeon who should be aware of the anatomic variations of the gallbladder and biliary system.Presence of cystic lesions adjacent to the gallbladder on imaging should raise the suspicion of gallbladder anomaly. Further diagnostic preoperative imaging is important to avoid surprises, complications and overlooking of a second gallbladder.MRCP is the imaging modality of choice for suspected duplicate gallbladder.We think the risks associated with laparoscopic cholecystectomy for duplicate gallbladders are comparable to those with non-duplicate gallbladder. However, these cases probably do better in the hand of an experienced laparoscopic surgeon or a hepatobiliary surgeon.