Former YouTube CEO Suan Wojcicki has died on Friday, according to social media posts from her husband Dennis Troper and Google CEO Sundar Pichai. Wojcicki was 56. Wojcicki had been fighting non-small cell lung cancer for the past two years.

“Susan was not just my best friend and partner in life, but a brilliant mind, a loving mother, and a dear friend to many," Troper wrote in a post on Facebook. "Her impact on our family and the world was immeasurable. We are heartbroken, but grateful for the time we had with her.

Please keep our family in your thoughts as we navigate this difficult time.” Non-small cell cancer is one of two primary forms of lung cancer and is often diagnosed late, according to the Yale School of Medicine. Symptoms are often mistaken with common illness and when people are diagnosed the disease has typically reached an advanced sage, per the university.

Upon hearing the news, Puchai took to X and posted his condolences. "Unbelievably saddened by the loss of my dear friend Susan Wojcicki after two years of living with cancer," he wrote. "She is as core to the history of Google as anyone, and it’s hard to imagine the world without her.

She was an incredible person, leader and friend who had a tremendous impact on the world and I’m one of countless Googlers who is better for knowing her. We will miss her dearly. Our thoughts with her family.

RIP Susan." Wojcicki was among the first 20 employees at Google, which acquired YouTube in 2006 for $1.65 billion.