For King & Country, stylised as for KING & COUNTRY and formerly known as Joel & Luke as well as Austoville, is a Christian pop duo composed of Australian brothers Joel and Luke Smallbone. The brothers were born in Australia and emigrated to the United States as children, settling in the Nashville area.

Joel David Smallbone is an Australian-American singer and actor. He is a member of the Christian pop duo For King & Country along with his brother Luke Smallbone. He played the role of James Stevens in the 2016 film Priceless. He directed the 2024 American Christian drama film Unsung Hero, plus playing the role of his father David Smallbone.