Prior to the formation of PHOX, many eventual members collaborated with Zach Johnston for his album Sonntag, which was written in California, but recorded in Wisconsin. Some time later while Matt Holmen was playing with Davey Roberts, Matt Roberts, and Jason Krunnfusz in Baraboo. The group connected once again for what was originally thought to be a one-off show at the local event, Boo Bash on May 4, 2011. The group still needed songs to play and someone to sing them. Monica Martin was asked if she'd sing some tracks from Sonntag and some cover songs at the event and she agreed. Moving forward, Monica wrote lyrics and melodies, and the group arranged the songs from their first two EP's and their self-titled first record release. The band released their EP Confetti in early 2013, for which they created a video component for each track. 2013 also saw a Daytrotter session, positive press, a spot at South by Southwest and a national tour opening for Blitzen Trapper. The band played Lollapalooza as a last-minute addition in August 2013, drawing a large crowd despite their midday spot. In September 2013 PHOX opened for The Lumineers at Apple's iTunes Festival in London. Local Wisconsin publication Isthmus praised PHOX as one of the year's greatest musical success stories. Throughout 2015, Phox supported Paolo Nutini and The Head and the Heart, while also headlining around the U.S. non-stop. They also made their debut in New Zealand and Australia during March 2015. They were also featured on NPR Music's Tiny Desk Concert. Other notable festival stops include Coachella, Bonnaroo, Firefly, Summerfest, Sasquatch, and the inaugural Eaux ClairesMusic and Arts Festival where they also screened their latest film titled, Amor Fati, directed by member Zach Johnston. The film was uploaded publicly to YouTube on December 24, 2015. The band is currently signed to Partisan Records, and are managed by Foundations Artist Management. They recorded their first full-length, self-titled album at April Base – Justin Vernon's home studio in Eau Claire, Wisconsin. PHOX announced an indefinite hiatus on October 17, 2016. The band played their farewell concert at the Al. Ringling Theatre in their hometown of Baraboo, WI on February 4, 2017.