We present a case of 36-year male patient who was referred to the Civil Hospital, Karachi with intermittent abdominal pain and vomiting for the last 2 years. The contrast enhanced CTexamination revealed changes of acute pancreatitis, CTSI 4/10, pancreatic calcifications along with 22x17 mm partially thrombosed pseudoaneurysm of gastroduodenal artery. The aberrant right hepatic artery was incidentally seen, on the arterial phase acquisition, arising directly from abdominal aorta. Gastroduodenal artery pseudoaneurysm is a rare complication of acute pancreatitis. It can lead to hematemesis, and it can bleed massively into peritoneal cavity. The aberrant origin of right hepatic artery from the aorta is extremely rare. To the best of authors' knowledge, less than five cases have been reported previously in literature.