WATCH------> Megyn Kelly Opens Up About Leaving Fox News for NBC In Emotional Goodbye Message

Megyn Kelly bid farewell to her loyal viewers on Tuesday's episode of The Kelly File

"This was a tough decision for me"

"Finally tonight, a personal and professional note, from me to you. After more than a dozen years at Fox News, I have decided to pursue a new challenge," she began her heartfelt message.

"This was a tough decision for me, because I love this show, our staff, my crew, my colleagues here at Fox, and you, those who write me the lovely handwritten notes, asking about my kids, and even those who -- very rarely -- complain on Twitter about our coverage after our show, or a presidential debate," she added, commenting on Donald Trump's famous attack against her after she moderated the first GOP debate.