It looks like an underdog tale: A foreign-language film with an unknown cast taking the Oscar nominations by storm.
But behind Roma lies a $25 million ($36.5m) campaign by Netflix, the US streaming giant, enlisting Angelina Jolie as the film's Hollywood champion.
Netflix has its eye on the best picture Oscar, one of 10 nominations for Alfonso Cuaron's black and white film about a domestic worker in 1970s Mexico City.
Its campaign is the most expensive of the Oscar season and dwarfs the US$15m it cost to make the film.
Academy voters have been showered with promotional material, including a 200-page coffee-table book and handmade chocolates. Netflix bought a US$170,000 ad spot during CBS morning news, as well as print and digital ads.