The son of the Lord Russell of Killowen, Russell was Lord Justice of Appeal from 1962 to 1975, having been made also a Privy Councillor in 1962.
On 30 September 1975, he was appointed Lord of Appeal in Ordinary and became additionally a life peer with the title Baron Russell of Killowen, of Killowen in the County Down, the same title, that his grandfather and father already had.