People: Aspiring actress and Florida model Samantha Burke is the mother of Jude Law's fourth child, her attorney says.

"Ms. Burke can confirm that she did in fact have a relationship with Mr. Law and that she has informed Mr. Law that she is expecting his child later this fall," the lawyer, who is not identified, tells TMZ.com. "Since informing Mr. Law of the pregnancy, he has been nothing but responsive and supportive of Ms. Burke and the pregnancy."

A Florida friend of Burke's also tells PEOPLE that the model told her she was "pregnant from Jude Law."

Law's rep declined to comment.

On Wednesday, the actor, who has three children with ex-wife Sadie Frost, announced he was expecting a fourth child with an unidentified former lover.

Law, 36, next will appear in Hamlet on Broadway in October, and will star with Robert Downey Jr. in the film Sherlock Holmes opening on Christmas Day.

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