Joel and Luke Smallbone formed a group back in 2007 called "Austoville", which was changed to "Joel and Luke" in 2008 when they released the EP A Tale of Two Towns. After signing with Warner Music Group in 2009, the Christian Duo took the name "for King & Country."
On January 11, 2019, the song "God Only Knows" peaked at No. 2 on the US Hot Christian Songs chart. Joel and Luke approached Dolly Parton and her management about her singing on the single and being in the video of "God Only Knows." After hearing the single Parton said, "there was no question, I wanted to be involved."
for KING & COUNTRY: Dolly Parton Documentary
For King & Country along with Parton had a blast working on the video for "God Only Knows." The three different scenes were shot with a special camera that shoots two different shots, then takes away half of each scene and fuses the leftover scenes.
for KING & COUNTRY + Dolly Parton - "God Only Knows" (Official Video)