Matt Damon and his wife LUCIANA are expecting a baby girl, the actor has revealed.

Damon, who married in secret last month (DEC05), confirmed the news to reporters in the Dominican Republic, where he is shooting new movie THE GOOD SHEPHERD with Angelina Jolie and Robert De Niro.

When quizzed about his four-month pregnant wife, Damon replied in Spanish, "It will be a girl," according to local newspaper El Caribe.

Argentina-born Luciana has been teaching Damon Spanish.