The cast, led by Laura Galán (who reprises her role from the short film), also features Richard Holmes, Carmen Machi, Claudia Salas, Irene Ferreiro, Camille Aguilar and Pilar Castro.

Piggy premiered at the Sundance Film Festival on 24 January 2022, before its theatrical release in Spain (14 October 2022) and France (2 November 2022).

Sara, labelled Cerdita[a] by bully Maca and her friends Roci and Claudia, is an overweight teenage girl living in a small town in Extremadura.

While walking home, she is harassed by a group of men and escapes onto a side road, where she sees a parked van which, initially unbeknownst to her, an unnamed man is using to kidnap her bullies.

[9] A Spain–France co-production boasting a €2.5 million budget, the film was produced by Morena Films [es] alongside Backup Studio and Cerdita AIE in association with La Banque Postale and Indéfilms, with the participation of RTVE and Movistar+, and support from the Junta de Extremadura, Eurimages, the Creative Europe's MEDIA sub-programme and the Madrid's regional administration.

[21] Other distribution deals include those with Alamode (Germany), Praesens (Switzerland), I Wonder (Italy), Nonstop Entertainment (Scandinavia and Baltics) and ADS Service (Hungary).

The website's consensus reads: "Brought hauntingly to life by Laura Galán's committed performance, Piggy deftly deploys genre thrills in service of sharp social commentary.

"[23][24] Jonathan Holland of Screen Daily wrote that the film "smartly mashes up thriller, rural drama and comedy elements into a lovingly-crafted, potently atmospheric, and thought-provoking whole — with bucketsful of horrible blood thrown in for good measure", and praised the "terrific" character work.

[25] Guy Lodge of Variety wrote that the film "sits at an unexpected intersection of artistic sensibilities, first recalling Catherine Breillat, then Brian De Palma, before taking a deep, bloody plunge into grindhouse territory toward its unsettling, ambiguous finale", comparing Sara's journey to Carrie's.