Francisco Muniz IV (; born December 5, 1985) is an American actor and racing driver. Muniz came to prominence in the 2000s playing the title character of the Fox sitcom Malcolm in the Middle (2000–2006), for which he was nominated for an Emmy and two Golden Globe Awards. He also worked in the films Big Fat Liar (2002), Deuces Wild (2002), Agent Cody Banks (2003), and Racing Stripes (2005). At the height of his fame in 2003, Muniz was considered one of the most popular child actors and "one of Hollywood's most bankable teens".

In 2008, Muniz put his acting career on hold to pursue an open-wheel racing career and competed in the Atlantic Championship. He returned to racing in 2021 in stock cars, joining Rette Jones Racing for a full season in the ARCA Menards Series in 2023, where he finished 4th in the standings. He competes full-time in the NASCAR Craftsman Truck Series, driving the No. 33 Ford F-150 for Reaume Brothers Racing.