One shows Legolas shooting an arrow and there's a big arrow sticking out of the building opposite.
There's even been a film-making competition for kids to try and find the next Peter Jackson!
"There are so many celebs," Miett told Newsround. "That's what makes it so fantastic.
"We are expecting tens of thousands of people to turn up in the streets and show support for Peter Jackson - Wellington is his home town. And the cast all lived here for a year and travelled around New Zealand while filming.
"It's right that the finale should be here. It's the last film in the trilogy - it means a lot to the people who live here."
The Return of the King opens in both the UK and the US on 17 December.