Credit: Carlos Alvarez/Getty Images; David Crotty/Patrick McMullan via Getty Images; Jason LaVeris/FilmMagic

A new viral sensation has swept Hollywood, all thanks to Filmstruck, the streaming service that allows users to watch classic films. Filmstruck’s Twitter sent out the call on Tuesday, writing, “We want to celebrate the personal nature of cinema and fill your timeline with the films that define you. Pick 4 films and then tag 4 friends to do the same! #FilmStruck4.” And celebs are rising to the challenge in droves, including Jessica Chastain, Chance the Rapper, and Guillermo del Toro.

Chance the Rapper chose Drumline, Prince of Egypt, Moonwalker, and Shrek as his #Filmstruck4, while Chastain made separate posts for defining films and defining performances. This year’s Oscar winner for Best Director couldn’t manage to limit himself to just four, and posted eight stills instead (fans won’t be surprised to see some classic monster movies on his list).

See more celeb #Filmstruck4 choices below.