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Sadie
PersonSadie is Christina Applegate's 15-year-old daughter and a baby who participated in a neuroscience study.
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The name "Sadie" appears in two separate news contexts. First, Sadie is the 15-year-old daughter of actress Christina Applegate. Applegate's recent interview discussing the impact of her multiple sclerosis diagnosis, including being largely confined to bed, highlights her continued role as a mother to Sadie, even amidst significant health challenges. Applegate mentions still taking Sadie to school. Separately, a baby named Sadie participated in a neuroscience study at Trinity College Institute in Dublin. This study suggests that 2-month-old infants possess a more complex understanding of the world than previously believed. Sadie's participation involved undergoing a Foundcog scan with her mother, Donna. The significance of both instances lies in their respective contexts: Applegate's public struggle with MS and its impact on family life, and the advancement of our understanding of infant cognitive development.
Last updated: April 4, 2026