After the 1984 death of his grandfather, Keith Mitchell changed his surname to Coogan. Three years later, he made his feature acting debut as the youth with a crush on Elisabeth Shue in the amiable comedy "Adventures in Babysitting" (1987). That same year, he was a geeky teen cousin to fugitive Jon Cryer in "Hiding Out". Coogan went on to play Ted Danson's son, capable of telling chilling horror stories to children, in "Cousins" and had an African adventure in "Cheetah" (both 1989). He received more notice for playing the bright second lead to Sean Astin in "Toy Soldiers" and as the flaky brother of Christina Applegate in "Don't Tell Mom the Babysitter's Dead" (both 1991). More recently, Coogan was the dumbest guy on earth who ends up in a skiing competition in "Downhill Willie" (1996).