Law's publicist has confirmed the actor is no longer "in a relationship" with the mother of his unborn child.
The spokesperson tells EW.com, "Jude Law can confirm that, following a relationship last year, he has been advised that he is to be the father of a child due in the fall of this year.
"Mr. Law is no longer in a relationship with the individual concerned but he intends to be a fully supportive part of the child’s life. This is an entirely private matter and no other statements will be made.
Law has three kids from his former marriage to actress Sadie Frost - Rafferty, 12, Iris, eight, and six-year-old Rudy Indiana Otis.
Reports suggest the Alfie star is currently single. He split from actress girlfriend Sienna Miller after his infidelity with his children's nanny was exposed in 2005.