Winx Club: The Secret of the Lost Kingdom is an Italian CGI animated feature film, based on the television series Winx Club, taking place after the events of the first three seasons. The film had premiere on November 30, 2007 in Italian cinemas.

Rainbow S.r.l. offered the film to the Cannes Film Festival in 2007. Australian singer Natalie Imbruglia sings the film's theme song, "All the Magic". Elisa Rosselli performed the other songs, including "Fly", "You Are the One", "Enchantix, Shining so Bright", "Only a Girl", and "You Made Me a Woman". The movie was released on DVD in Italy in early March 2008.

Straffi has noted that it was difficult to animate the girls' hair correctly in 3D.