04/29/2014 10:25 am ET Updated Apr 29, 2014

Matt Lauer Professes His 'Full-Fledged Love' For Diane Keaton

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Watching Matt Lauer interview Diane Keaton Tuesday morning was like watching a third-grade boy fall in love for the first time.

The "Today" show co-host could not hide his infatuation with the Hollywood actress and often had to look down at his notes just to stop smiling and stay focused.

"I have often expressed on the air my undying love and affection for you," Lauer told Keaton. "I think you're beautiful and fascinating."

The love was mutual. Keaton told Lauer that she thinks he has a beautiful body and "a nice chest."

"I started with a crush, I end this interview with full-fledged love for you," Lauer said.

Watch the video to see the love story develop on "Today."