Daphne Oz is sadly mourning the loss of a close family member.

The 31-year-old TV star took to Instagram on the evening of Thursday, Feb. 16 to confirm her father-in-law, Sretko Dimitric, has sadly died. Sretko is dad to Daphne's husband, John Jovanovic.

MUST SEE: Tom Cruise's Mom Has Died at Age 80

"Thank you all for your generous prayers and kindness. I wanted to let you know that, after a long battle with cancer (and many days and weeks and months that were unequivocal wins), my father-in-law passed away this afternoon," she wrote on the social media outlet.

View this post on Instagram

lover boy ❤️

A post shared by D A P H N E O Z (@daphneoz) on

"We are heartbroken, but grateful that we could spend the past few days together as a family and that he is at peace. The kids coming to visit him in the hospital always put a huge smile on his face, which is how we'll remember him. ❤❤❤," Daphne captioned a photo of her two children, daughter Philomena, 2, and John, 1.

"So sorry for your loss. Praying for you and your family," one of Daphne's nearly 230,000 Instagram followers commented on the pic with another adding, "May your memories with him and his grandchildren help you grieve his passing."

MORE: Daphne Oz Takes Kids Philomena and Jovan to Disney World — See the Cute Pic!

Earlier this week, the mom-of-two told her fans she would be taking some time off to deal with a family matter. "You won't see me on The Chew this week as my father-in-law is very sick and we are with him as a family in Chicago," she wrote.

"Moments like this remind me that love really is the only thing that ever matters: nurture it, let it grow, make it count. Happy Valentine's Day. ❤❤❤," she captioned a photo of her daughter, Philo.

Daphne and her husband, John, tied the knot in August 2010 after previously meeting at Princeton University. They later welcomed their first child, Philo, in February 2014 and son John in October 2015.

MORE: See Hilaria Baldwin, Daphne Oz and More Celebrity Moms You Should be Following on Instagram

Daphne's father is TV star Dr. Mehmet Oz and her mother is writer Lisa Oz. Her hubby John's parents are Sretko — who owned a contracting firm in Chicago — and Nada Jovanovic Dimitric, who works at an insurance and financial service company.

Our thoughts are with Daphne, John and their family at this difficult time.