Noo-Noo (operated by Mark Dean in the original series and Victoria Jane and Olly Taylor in the new series) is the Teletubbies' sky blue pet. He lives in Teletubbyland as a vacuum cleaner. Noo-Noo never leaves the house in the original series. He doesn't speak like the Teletubbies can; he makes sucking and slurping noises. He has a long elephant-like nose which he uses for tidying up. He also has a big pink light at the back of him. At times, Noo-Noo gets annoyed with the Teletubbies' antics or gets too excited and, therefore, can tidy up their food or favourite things. The Teletubbies shout 'Naughty Noo-Noo.' and chase him around the house. The chase usually ends with a Big Hug. Noo-Noo has a brush on top of him that is also detachable. It is extremely rare for his brush to be detached. It is only seen detached in the episode Swans and the video Big Hug!.
- In the new series, Noo-Noo is no longer blue. He is now orange, pink and gold. The reason behind it was because the show was using Blue Screen; therefore, only some parts of him would be shown. Other than the colour change, Noo-Noo's appearance remains the same.
- In the new series, Noo-Noo isn't as naughty as he was in the original series. In fact, the only episode where he is naughty is Packing.
- In the new series episode, Fixing Things, Noo-Noo goes outside for the first time.
- According to some rare concept art pictures, Noo-Noo was originally going to look like a space robot with tread wheels and a trunk. (See pic below)