During an interview with Dutch TV which aired Monday, the Dreamgirls star was questioned about his relationship with Brown. Murphy said, "And I don’t know whose child that is, until it comes out and has a blood test. You shouldn’t jump to conclusions, sir."
The actor, who was divorced last April, was dating the British singer for several months.
This week, Murphy was spotted in public in the arms of his new love, film producer Tracey Edmonds.