Marnie Schulenburg shocked her fans with her recent untimely death. She was 37.

Schulenburg, who played the role of Alison Stewart on "As the World Turns," died in Bloomfield, New Jersey. Her representative, Kyle Luker at Industry Entertainment, confirmed the saddening news to The Hollywood Reporter.

Her husband, "Succession" actor Zack Robidas, also shared a Facebook post where he confirmed Marnie Schulenburg's cause of death.

"Please don't say Marnie lost her battle with cancer. It's simply not true. I watched her kick cancer's a** everyday since diagnosis. She is incredible. We chose to attack her diagnosis with blind optimism. We only talked about the future and continued moving forward. I don't know if this was right but it's all we knew how to do," he said, as quoted by Variety.

The news outlets said that the actress suffered from stage 4 metastatic breast cancer, and its complication led to her death.

According to the American Cancer Society, stage IV cancers always metastasize (spread) beyond a patient's breast and nearby lymph nodes to other parts of the body. Usually, breast cancer spreads to the bones, lungs, liver, and brain.

Schulenburg received her diagnosis five months after welcoming her and Robidas' daughter, Coda, in December 2019.

Fans who have been supporting Schulenburg despite her cancer battle left messages to the late actress and her family.

Marnie Schulenburg's Acting Career

Before her death, Schulenburg famously made her debut on CBS' series, "The Young and the Restless," in 2007. Her character was reintroduced in "Digital Daytime: L.A. Diaries."

She also scored a role in "As the World Turns" and played the character until the show's cancelation in 2010. Her remarkable performance led her to receive a Daytime Emmy nomination.

Schulenburg also appeared as a guest star in other primetime shows, like "Fringe," "Blue Bloods," Elementary," "The Good Fight," "Royal Pains," and "City on a Hill."

She got the chance to spend time with her husband and daughter - for the last time - during this year's Mother's Day.

"I know that me being here for [Coda] is the best gift I can give her. Nut right now, it feels like settling since she's getting a half-life version of myself. My mother showed up 100 percent all day every day for me growing up, or at least it seemed that way. I want to give Coda the same, but I must be kind to myself and remember that nothing is permanent," she wrote, as quoted by SheKnows Soaps.