Peter Hollens describes himself as having faith and believing in God without identifying with a specific religion. He has participated in spiritual or religious productions, including recordings of "Hallelujah" and "Baba Yetu," and has worked closely with many Christian-identified performers.
In December 2014, Hollens participated in the world's largest Christian nativity scene in Provo, Utah, alongside Mormon-identified people such as Alex Boye. Hollens has also worked with Catholic singer Jackie Evancho, who primarily performs Christian hymns, and Lindsey Stirling, who is a devout Mormon. Hollens describes having an affinity for Mormon spirituality, stating that he wanted to be part of the Mormon Tabernacle Choir as a child.