Marvel Studios has officially cast Ralph Ineson as Galactus in the upcoming Fantastic Four movie reboot in the Marvel Cinematic Universe! Ralph Ineson joins the MCU as Galactus as well as Julia Garner as the female Silver Surfer, Galactus' herold. John Malkovich also joins the cast of the Fantastic Four and the mcu in an undisclosed role! Fantastic Four casting and plot details breakdown!