Katie Thurston, who starred on the 17th season of "The Bachelorette," revealed she has been diagnosed with breast cancer. The television personality made the announcement in a lengthy Instagram post on Saturday, detailing her battle thus far.

The former "Bachelorette" leading lady, 34, from Season 17 announced her breast cancer diagnosis in a lengthy Instagram post Saturday.

Former Bachelorette Katie Thurston revealed via Instagram on Saturday, February 15, that she was fighting breast cancer

Katie Thurson has breast cancer. The Bachelorette staple revealed the diagnosis in an emotional Instagram post, captioning a photo of her in black and white while also sharing mixed emotions as she reflected on her diverted plans thanks to her new reality.

I experienced a range of emotions ... Despair. Anger. Sadness. Denial. And then strength. Purposeful. Ready,” Thurston said

The Bachelorette’s Katie Thurston is celebrating the small victories following her breast cancer diagnosis. “Finished biopsy. Went much better this time,” Thurston, 34, wrote via her Instagram Story on Wednesday,

“The Bachelorette” alum Katie Thurston has breast cancer. The reality star, 34, announced her diagnosis in a message to her Instagram followers on Saturday. “Life update: I have breast cancer,” she wrote, alongside two photos of herself taken by her fiancé, comedian Jeff Arcuri.

The Bachelorette alumna Katie Thurston took to Instagram today to share that she has been diagnosed with breast cancer.

On one of her Instagram Stories, also posted on Saturday, Thurston said she is “waiting on learning what stage” she’s in and is planning to get another biopsy to find out more information. She also shared that there is no history of breast cancer in her family.

I experienced a range of emotions over the past two weeks. Despair. Anger. Sadness. Denial. And then strength,” Thurston said of her diagnosis.