Britain's smallest native carnivore, the least weasel (Mustela nivalis) has a long slender body, and a short tail. The fur is ginger to a rich chocolate-russet brown in colour, and the underparts are creamy-white. The narrow head is supported on a long neck, and the legs are short. The large eyes are black, and the ears are rounded. In northern parts of the range, weasels turn white in winter, but they do not do so in the UK.
- It played Jack-in-the-Box in Wildlife Story 3 (NatureRules1 Version)
- It played Ice Bear in We Bare Mustelids and We Bare Mustelids: The Movie
- It played Blossom in The Powerpuff Mustelids, The Powerpuff Mustelids Movie, and The Powerpuff Mustelids (2016)
- It played Leonardo in Teenage Mutant Ninja Mustelids
- It played Lyla (Mermaid) in Mako Mustelids
- It played Garnet in Tombo Universe
- It played Sparx in Super Robot Mustelid Team Hyperforce Go!
- They played Lincoln Loud, Ronnie Anne Santiago, Lynn Loud Sr., and Rita Loud in The Mustelid House
- It played June (Mermaid) in MerMustelids (2003)
- It played Clover in Totally Mustelids
- It played Myrna Beesbottom in Totally Yellowstone Animals