The couple, who have been engaged for nearly a year, said the ceremony will air live on ABC.
"It's really exciting," Lowe told People.com.
"Time has just flown by -- I think January is going to sneak up on us pretty quickly!" he said. "I think it's only natural to have it on TV seeing as how our relationship started. This will be a cool opportunity to share the most special day of our lives with all the people who have been invested in us along the way."
"I haven't found my dress yet," Giudici told People.com. "I know I want it to be form-fitting ... Not too princessy."