John Krasinski is one of the stars of IF, a movie about imaginary friends — but can he tell the difference between a real imaginary friend and a fake one?
This is the question posed by host Greg James in the BBC Radio One interview above, with three different people calling in to tell Krasinski about their childhood imaginary friends. One of the callers is lying, but Krasinski has to work out which.
Turns out it's harder than you might think.
Topics BBC Celebrities
