In their Easter instalment of "The Miley and Mandy Show" on YouTube, 20-year-old Jiroux, who performs as a back-up dancer for the popular teen star, reads a question from a fan who asked if the girls were Christian.
The squeaky-clean duo emphatically respond, "Yes!"
"Yes! We love Jesus!" says Cyrus, 15, as she nods her head in agreement. "Happy Easter, by the way. He died for our sins. That's how awesome he is.
"Jesus rocks! That's why we do what we do," the Hannah Montana star adds. "She (Mandy) dances for Jesus. I sing, dance and act for Jesus! ... Now that I think about it, I do everything for Jesus. We make the YouTube videos for Jesus. We're all about it."
Her comments should come as no surprise to fans who have been following her career.
Cyrus, who plays a high school teen with an alter-identity as a pop singer on the hit Disney Channel show, has been very vocal about her faith.
She recently credited her family and faith for keeping her grounded in an interview with TV presenter Barbara Walters that aired for the Oscars.
"Some people don't have a family to fall back on, like I have, and that's when something greater than even that comes in - and that's faith and that's what I have for me," Cyrus told Walters, according to ABC News. "That's what keeps me strong."
In an appearance on Oprah last year, Cyrus had also mentioned church as the source of her strength.
When asked to name her favourite Bible verse, she referred to Ephesians 6:10-11, stating "Finally, my brother, come close to the Lord for if you put on the full armour of God you can stand against the wiles of a devil."
Her most recent movie release, "The Hannah Montana & Miley Cyrus: Best of Both Worlds Concert Tour", has grossed over $63 million. Cyrus' next project will be "The Hannah Montana Movie", slated for a May 2009 debut.