Bill Hybels is the founding and senior pastor of Willow Creek Community Church in South Barrington, Ill., and chairman of the board for the Willow Creek Association. The bestselling author of more than twenty books, including Leadership Axioms, Holy Discontent, Just Walk Across the Room, The Volunteer Revolution, and Courageous Leadership, and classics such as Too Busy Not to Pray and Becoming a Contagious Christian, Hybels is known worldwide as an expert in training Christian leaders to transform individuals and their communities through the local church. He and his wife, Lynne, have two adult children and two grandsons, Henry and Mac.

Originally from Australia, Darren Whitehead founded Church of the City in Nashville, Tennessee, in 2013. He is the author of the bestselling books Holy Roar (coauthored with Chris Tomlin) and The Digital Fast. He holds both his master's and doctorate degrees in ministry, with his dissertation research focusing on Millennial engagement in the Western church. He lives with his wife, Brandy, and their three daughters in Nashville, Tennessee.

Jon Tyson is a pastor and author in New York City. Originally from Adelaide, Australia, Jon moved to the US two decades ago to seek and cultivate renewal in the Western church. He is the author of the bestselling books The Intentional Father and Fighting Shadows. He serves as the lead pastor of Church of the City New York. Jon has been married to Christy for twenty-five years and has two adult children.