Mia Thermopolis: Oh my God, you're here.
Lilly Moscovitz: I know.
Mia Thermopolis: In Genovia.
Lilly Moscovitz: I know.
Mia Thermopolis: You're in my closet.
Lilly Moscovitz: Yeah.
Mia Thermopolis: You're blonde.
Lilly Moscovitz: I'm blonde.
Lilly Moscovitz: Does this popcorn taste like pears?
Mia Thermopolis: Mmm, Genovian specialty.
Queen Clarisse Renaldi: A princess never chases a chicken.
Mia Thermopolis: Just because I didn't get my fairytale ending doesn't mean you shouldn't.
Queen Clarisse Renaldi: Nepotism belongs in the arts, not in plumbing.
Nicholas Devereaux: Rapunzel, Rapunzel, with hair so fine. Come out your window, climb down the vine.
Mia Thermopolis: The feat you ask, dear sir, isn't easy. And I won't respond to that line, it's far too cheesy.
Mia Thermopolis: Just remember, you are a princess.
Mia Thermopolis: I thought you said you never slide?
Queen Clarisse Renaldi: Oh I don't, but I have done a lot of flying in my day.
Lady's Maid Brigitte: Princess Mia, a strange woman came in here and asked to hide in your closet so I let her.
Mia Thermopolis: Well, dear, that probably wasn't the best idea.
Queen Clarisse Renaldi: I know it's short notice, but you were all dressed.
Mia Thermopolis: I have my own mall.
Queen Clarisse Renaldi: Dear Joseph, am I too late to ask you to accept my hand in marriage?
Joe: I thought you'd never ask.
Security Guard Lionel: Your Majesty, I would gladly take a bullet for you.
Queen Clarisse Renaldi: Oh, how brave. Most interns don't even want to fetch me my tea.
Security Guard Shades: The Sparrow is taking off.
Charlotte Kutaway: The Eagle is flying for the last time.
Joe: With this ring, I thee - finally - wed.
Nicholas Devereaux: I haven't danced with you since your birthday.
Mia Thermopolis: That's a fact, not a secret.
Nicholas Devereaux: The secret is, I still want to.
Joe: I would kneel if it weren't for my knee replacement.
Mia Thermopolis: Oh, by the way, I'm getting married.
Lilly Moscovitz: To who?
Mia Thermopolis: I don't know.
Queen Clarisse Renaldi: The Queen is never late, everybody else is simply early.
Answer: My guess is because Mia and Michael didn't actually start dating until the third Princess Diaries book. The second and third books were all about Mia trying to get Michael to go out with her, and since they went out at the end of the first movie, they couldn't base the second movie on the second book.