Cassandra M. “Cassie” Biller, 41 of Milledgeville, IL, died Tuesday, October 14, 2025, at CGH Medical Center in Sterling, IL.
She was born on June 5, 1984, in Rockford, IL, the daughter of Stephen J. and Katherine E. (Stone) Biller. Cassie had worked at Rolling Hills Center in Lanark, IL, and had received the American Flag for plant #1 Worker of the Year in 2021. Cassie enjoyed working puzzles, attending fairs, and concerts. She loved attending ballgames and cheering on the participants.
Survivors include her father, Steve (Jane) Biller; step-brothers, Michael (Sydney) Buikema of AR and Nicholas Buikema of TX; aunts, Vicki Biller, Deb (Chris) Boles; uncles, Rob (Deb) Stone, David Stone, and Rodney Biller; grandfather, Johann (Sue) Biller; multiple cousins.
She was preceded in death by her mother, Katherine; uncle, John Stone; aunt, Sharon Stone; grandparents, Maxine Biller, Don Stralow, Betty Stralow, and Pastor Robert Stone.
Cremation has taken place.
There will be a Celebration of life for her at a later date.
Arrangements were entrusted to the McDonald Funeral Home & Crematory.
A special thank you to Southtown Terrace for caring for Cassie. This was her home for 22 years. She loved all of you.