Giuliana Rancic has a lot to be thankful for this holiday season.

The TV star bravely took to Instagram on Sunday, Dec. 18 to share that she has been cancer-free for five years — and we couldn't be more thrilled to hear this exciting health update!

"'Everything will be OK in the end. If it's not OK, it's not the end.' Ever since I was diagnosed with breast cancer, this quote has been my mantra. These words have been my anthem, my inspiration, my comfort, and my prayer," the 42-year-old powerfully wrote on the social media platform.

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"Everything will be OK in the end. If it's not OK, it's not the end." Ever since I was diagnosed with breast cancer, this quote has been my mantra. These words have been my anthem, my inspiration, my comfort and my prayer. They gave me hope that the emotional and physical struggles that had suddenly consumed my life were NOT my life forever. That this was temporary, and I would pass through this storm and feel the sun on the other side. That I would one day feel like "me’ again and be OK. This week, these words are especially meaningful as I celebrate an important milestone – the one I have prayed for every night for one thousand, eight hundred and twenty-seven nights: Five years cancer-free. Now that I’ve reached this critical milestone, the odds of the breast cancer coming back are not gone but exponentially lower. Breast cancer is more of my history, less of my present, but that doesn't mean I am leaving this battlefield. Through my journey, I have met those who, it breaks my heart to say, did not reach this milestone. This past year alone, more than 40,000 people died of breast cancer, while another 300,000 received the devastating diagnosis and began their own journeys through the storm. And I pray for them all. To those we have lost, I will keep your spirit alive by continuing your fight. And for those who are fighting now, I will pray for you and hope that the same words that helped pull me through the darkest hours will give you some comfort, too. That you will have faith that everything will be OK in the end. For me, this week marks a new beginning. I breathe a sigh of relief as I come to the end of this five-year marathon and cross the most significant finish line of my life so far. I can now declare, with immense gratitude and God's love, that I can feel the sun shining on my face. And I can also say that I'm finally…OK.

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"They gave me hope that the emotional and physical struggles that had suddenly consumed my life were NOT my life forever. That this was temporary, and I would pass through this storm and feel the sun on the other side. That I would one day feel like "me’ again and be OK," Giuliana continued.

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"This week, these words are especially meaningful as I celebrate an important milestone," she added. "The one I have prayed for every night for one thousand, eight hundred and twenty seven nights: Five years cancer-free."

The mom-of-one was previously diagnosed with breast cancer in October 2011 at age 36. In a recent interview with Closer Weekly, Giuliana shared special words of encouragement for women who are currently going through what she once did. "My best advice to them is what helped me. I remember the words 'this too shall pass.' And it does pass. Just knowing that there is a light at the end of the tunnel is what we need to get us through the day," she said.

Click through the gallery below to see more stars who have bravely battled breast cancer.