"I said yes," Lee captioned the picture, adding a diamond ring emoji.
Lee and Biegel visited Sacre-Coeur basilica Thursday and shared photos from their visit to Chez Georges restaurant the day before. The couple both enjoyed steak frites at the well-known establishment.
"A view to kill. #Paris," Biegel captioned a picture of Lee eating her meal.
Lee was previously married to singer Billy Joel from 2004 to 2010.
She is known for the Food Network shows "The Kitchen" and "Beat Bobby Flay," and also hosts "Beach Bites with Katie Lee" on the Cooking Channel. In addition, she also hosted the first season of Bravo's "Top Chef."
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