The forty-second season of the NBC sketch comedy series Saturday Night Live premiered on October 1, 2016, during the 2016–2017 television season, with host Margot Robbie and musical guest The Weeknd, and concluded on May 20, 2017, with host Dwayne Johnson and musical guest Katy Perry. The season removed two commercial breaks per episode in order to increase programming time. Episode 18 on April 15, 2017, was the first episode ever to be broadcast live in all four time zones within the contiguous United States. Until this episode, the show aired live only in the Eastern and Central time zones, and was tape-delayed in the Mountain and Pacific time zones.

Margot Elise Robbie is an Australian actress and producer. Her work includes both blockbuster and independent films, and her accolades include nominations for three Academy Awards, six BAFTA Awards and four Golden Globe Awards. Time named her one of the 100 most influential people in the world in 2017, and Forbes named her the world's highest-paid actress in 2023.