Winx Club is an animated series co-produced by Rainbow SpA and later Nickelodeon, with characters created and designed by comic artist Iginio Straffi. The show follows the titular Winx Club, a group of fairy warriors who defend the universe from villains while attending the Alfea College for Fairies.

The Winx Club is led by Bloom, a student from Earth who, unaware of her true heritage, believes she is an average human until discovering her flame-based powers. The original group includes Stella, the Fairy of the Sun and Moon and later of the Shining Sun; Flora, the Fairy of Nature; Musa, the Fairy of Music; and Tecna, the Fairy of Technology. Additional members include Aisha, the Fairy of Waves who is introduced in the second season, and Roxy, the Fairy of Animals who is introduced in the fourth season.

The characters of Winx Club have become popular with audiences and critical response to them has been positive, with praise for their positive relationships and portrayal of gender roles. The characters have appeared in various media, including the spin-off series World of Winx, a comic book series, and video games. In 2012, new episodes of the series incorporated CGI-animated sequences that rendered the characters in 3D. A live-action series inspired by Winx Club, Fate: The Winx Saga, aired from 2021 to 2022.

In the original series (seasons 1–4), the characters' mouths were animated to match the Italian voice actors, who recorded their lines in Rome. The revival series, beginning with the hour-long specials, was produced in English first. The specials and seasons 5–6 were animated to match the Hollywood-based cast, who recorded their lines at the Atlas Oceanic studio. Season 7 was also matched to Nickelodeon and Rainbow's English scripts, but due to budget cuts, Viacom relocated the voice cast from Hollywood to New York City.