Madeleine Grace McGraw (born December 22, 2008) is an American actress. She gained recognition for her roles in various horror-themed projects, including Outcast (2016–2018) and The Black Phone (2021), which earned her a Saturn Award nomination for Best Performance by a Younger Actor.

She also starred as Zoey Campbell in the Disney Channel series Secrets of Sulphur Springs (2021–2023) and has since portrayed a younger version of Hope van Dyne in the Marvel Cinematic Universe (MCU) film Ant-Man and the Wasp (2018) and the Disney+ series What If...? (2023).