Home Alone and Home Alone 2 make it look like Macaulay Culkin is doing all his stunts, but he certainly had some help. An adult stunt double named Larry Nicholas performed the child actor’s stunts. Nicholas and Culkin had extremely similar builds at the time, even though the stunt actor was much older than the movie’s main character.

https://screenrant.com/behind-the-scenes-facts-about-home-alone-2/