MILAN, May 2 (Reuters) - Italian shipbuilder Fincantieri is in talks with Norwegian Cruise Line (NCL) over an order worth around $4 billion to build new cruise ships, a source with knowledge of the matter told Reuters on Monday.

Italian daily Il Secolo XIX reported on Sunday that six new ships could be built by Fincantieri for the Miami-based company.

Norwegian Cruise Line declined to comment. (Reporting by Francesco Zecchini Editing by Cristina Carlevaro and Keith Weir)