Shearer broke the news on Instagram, writing that she first found a lump in late February and is scheduled to have a double mastectomy on Friday.
Shearer encouraged others to regularly perform self-examinations and prioritize their health, noting that the tumors formed when she was under 40 years old and without a family history of breast cancer.
“Even if cancer feels improbable, it’s still very possible,” she wrote.
Shearer and business partner Joanna Teplin founded their popular organizing business, The Home Edit, in 2015.
“Get Organized with The Home Edit,” a celebrity home organizational show, debuted on Netflix in 2020, featuring stars like Drew Barrymore and Chris Pratt. It has quickly become a hit on the platform, even launching a line of home organization tools with Walmart earlier this year.