"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.
"Now, I don't actually know most of you, so perhaps it's not true love, but it's the kind that makes one feel connected to another human being, and that, after all, is why I believe we're here -- human connection," she continued. "The truth is, I need more of that in my life, in particular when it comes to my children, who are 7, 5, and 3. So I'll be leaving Fox News at the week's end and starting a new adventure, joining the journalists at NBC News, who I deeply admire. I'll be anchoring a daytime show there, along with a Sunday night news magazine, and you'll see me there on the big nights too, for politics and such."
"I am very grateful to NBC for this opportunity, and I am deeply thankful to Fox News for the wonderful 12 years I have had here. I have grown up here, and been given every chance a young reporter could ever ask for," she shared. "The Murdoch family has been kind and good to me at every turn, and my colleagues are like a second family. So I will miss them and this show, and you. And I hope our human connection continues, albeit over a different line."
"Thank you for watching," she concluded. "With love."
ET confirmed on Tuesday that Kelly signed a multi-year agreement with NBC News, where she will host her own daytime news program, as well as anchor a Sunday evening news show and take part in special political programming and other breaking news coverage.
The mother of three took to Facebook to address the reports in a statement thanking her colleagues at Fox.
"I have decided to end my time at FNC, incredibly enriched for the experiences I've had," she wrote. "While I will greatly miss my colleagues at Fox, I am delighted to be joining the NBC News family and taking on a new challenge. I remain deeply grateful to Fox News, to Rupert, Lachlan and James Murdoch, and especially to all of the FNC viewers, who have taught me so much about what really matters."
Sources told ET on Tuesday that, as Kelly explained in her goodbye message to her viewers, her decision to leave Fox was one mainly based on family.
"Everyone is, and was, putting so much emphasis on the money aspect and how no other network would give her $20 million. But no one was listening to what she was hitting at the entire time -- which was that she wanted a schedule that would give her more time with her kids and allow her time to focus on specials," the source said.
"It's more important for Megyn to see her kids off to school and be home for dinner with her husband -- who has done a great job of being Mr. Mom for most of 2016, something she credits him for often," the source added.