Chris Columbus has brought to the screen some of the biggest American family films in the last 20 years: Adventures in Babysitting, Home Alone, and Mrs. Doubtfire. He also produced and directed the first two Harry Potter films and produced the third as well. Despite this success, Columbus admits that he “always, to this day, [feels] like [he’s] gonna walk on a movie and get fired.” He reveals to Alec what it was like working with brilliant improvisers like John Candy and Robin Williams—and casting Macaulay Culkin in Home Alone.