Kotb hid her engagement ring and slipped it on her finger shortly before making her on-air announcement, Today reported.
"My heart has literally been pounding,'' Kotb told her co-anchors. “I was totally shocked. He had a good poker face.”
Kotb said she has not told her two daughters -- Haley Joy, 2, and Hope Catherine, who she adopted in April -- about the upcoming wedding.
“We’re still trying to figure out that part,” Kotb said.