 He is sworn in as an Acting Judge of the Court, so from time to time still adjudicates on cases in the Northern Territory.Mildren was born in Adelaide, South Australia, and attended the Norwood High School and the University of Adelaide.He graduated with a Bachelor of Laws and Bachelor of Arts and from 1966–68 was an Articled Clerk to James Henry Muirhead who was later to become a Judge of the Supreme Court of the Northern Territory.