Disclaimer: Sadly, I don't own Little Britian, or The Simpsons.
Jeremy Rent's office.
Jeremy: (On the phone) Lovely! I'm sure Dennis will be very pleased! (Hangs up)
Voice: (Over the intercom) Dennis Waterman here to see you.
Jeremy: Lovely! Send him in.
Dennis enters the room.
Dennis: (In his usual high-pitched voice) Halo!
He struggles onto the chair.
Jeremy: Dennis, I have some very good news for you!
Dennis: Oh goody! Let's 'ear it!
Jeremy: I've just got off the phone with David Silverman, the director of The Simpsons Movie, and he wants you to make a guest appearance in the film. He's even sent the script for you.
Jeremy gives Dennis the script. To Dennis it's twice his size.
Dennis: Whoa! Heavy!
Dennis puts the script down on the floor.
Dennis: So the want me to star in it, write the feem toon, sing the feem toon—
Jeremy: I don't think they'll be needing a new theme tune for the movie, Dennis. I'm sorry to break the bad news.
Dennis dips his head down. After five seconds he brings his head back up and starts to sing.
Dennis: I'm trotting through the town of Springfield, do, do, do, do, do, do.
I'm helping out a fat bald ma-an, do, do, do, do, do, do.
I've got a good idea, just you keep me near, I'll be so good for The Simpsons Movie.
Jeremy: I'll tell them you're busy.