The Simspons executive producer Al Jean talks to IGN about the upcoming 14th season, including JK Rowling's appearance this fall on the popular series:
Al Jean:... The Simpsons go to London and it includes guest voices from Ian McKellen, J.K. Rowling, Jane Leeves and Prime Minister Tony Blair, playing himself.
IGN: Actually, I think getting J.K. Rowling is a bigger coup because she is better-known.
Al Jean: Well, she likes the show, we got her by satellite, I think from Scotland, and she'd just had her baby.
IGN: How did she record it? In a studio near her?
Al Jean: Yeah. What happens is they go into a studio where they are, they are on the phone with a dedicated line and we can just record them over the phone.