Fiona Shaw: Aunt Petunia
Uncle Vernon : I'm warning you. If you can't control that bloody bird, it'll have to go.
Harry : But she's bored! If I could only let her out for an hour or two...
Uncle Vernon : [chuckles] So you can send secret messages to your freaky little friends, no sir.
Harry : I haven't had any messages... from any of my friends. Not one all summer.
Dudley Dursley : Who'd want to be friends with you?
[nudges Harry out of way]
Uncle Vernon : I should think you'd be a little more grateful. We've raised you since you were a baby. We've given you the food at our table, you even have Dudley's second bedroom, clearly out of the goodness of our hands.
Aunt Petunia Dursley : [as Dudley tries to steal some cake] Not now, Popkins! It's for when the Msons are on.
Uncle Vernon : Which should be any minute!
[gestures everyone towards him]
Uncle Vernon : Now, let's go over our schedule once again, shall we? Petunia, when the Masons arrive, you will be-?
Aunt Petunia Dursley : In the lounge, waiting to welcome them graciously to our home!
Uncle Vernon : Good. And Dudley, you will be-?
Dudley Dursley : [in an accent] I'll be waiting to open the door.
Uncle Vernon : Excellent!
[he, Aunt Petunia, and Dudley walk toward Harry]
Uncle Vernon : And you?
Harry : I'll be in my bedroom. Making no noise and pretending I don't exist.
Uncle Vernon : Too right you are. This could well be the biggest day of my career. And you will not mess it up.