Spontaneous perforation is a rare complication of infantile choledochal cyst. We present a case of infantile choledochal cyst in a new born, which presented with abdominal distension, jaundice and acholic stools from 20 days of life. On evaluation was found to have focal dilatation of common bile duct and free fluid with septations. The infant underwent laparotomy and excision of the choledochal cyst followed by a Roux-en-y hepatico jejunostomy. It is important to follow up new born with choledochal cyst and intervene early with definitive management, for better outcome.