George Beverly Shea, the longtime singer who accompanied evangelist Billy Graham on his crusades across the world, turns 100 on Sunday.

The Billy Graham Evangelistic Association announced it will mark the milestone the next day at a private gathering at the Billy Graham Training Center at The Cove in Asheville, N.C.

The association noted that Graham has said he “would feel lost getting up to preach if Bev were not there to prepare the way through an appropriate song.”

Graham spokesman A. Larry Ross said Friday that it was uncertain if Graham, a comparatively young 90, will attend the celebration.

“It’s all based on his strength,” Ross said. “If he did, it would just be a cameo.”