She serves as the primary visionary and Co-Founding Director, with her husband Will, of The 818 The Sign movement, which is committed to seeing revival and reformation sweep through the inner cities and all across America.

Since she was 17 years old, Dehavilland has carried a passion for prayer. As a revivalist, she carries a forerunner message and has traveled across America and various parts of the world, including Africa, England, South America, and Israel, preaching the gospel with a burning desire to see transformation in the earth.