Guardians of the Galaxy star Chris Pratt hosts Saturday Night Live's 40th season premiere with musical guest Ariana Grade. Sketches include Marvel Trailer, He-Man & Lion-O, CNN State of the Union – NFL Cold Open, Cialis Turnt and Booty Rap.

Bill Hader makes his hosting debut alongside musical guest Hozier. Sketches include Herb Welch: Virginity Pledge Rally, The Group Hopper, Hollywood Game Night, Weekend Update: Stefon Returns, Puppet Class and Cat.

Jim Carrey returns as host for the third time while musical guest Iggy Azalea makes her SNL debut. Sketches include Halloween Party, Ghost Chasers, Carrey Family Reunion, Lincoln Ad and Weekend Update: Drunk Uncle on Halloween.

Former cast member Chris Rock hosts for the second time while Prince performs a special medley set. Sketches include Vlog, Shark Tank, How's He Doing, GoProbe and Swiftamine.

Woody Harrelson hosts Saturday Night Live for the third time and Kendrick Lamar performs. Sketches include 1989 Monologue, The Dudleys, Match'd, A New Day, Weekend Update: Matthew McConaughey & Woody Harrelson and Last Call with Woody Harrelson.

Cameron Diaz hosts Saturday Night Live for the fourth time while Mark Ronson and Bruno Mars serve as musical guest. Sketches include Back Home Ballers, Capitol Hill Cold Open, New Annie, High School Theater Show and Office Boss.

James Franco hosts Saturday Night Live for the third time while Nicki Minaj makes her second appearance as musical guest. Sketches include Peter Pan Live!, Star Wars Teaser, Brain Space, Kid Mayor and Porn Stars with James Franco and Seth Rogen.

Martin Freeman makes his Saturday Night Live hosting debut while Charli XCX serves as musical guest. Sketches include The Hobbit Office, Sump'n Claus, Church, Jacob the Bar Mitzvah Boy on Hanukkah and Waterbed Commercial.

Amy Adams returns to host Saturday Night Live while One Direction makes their third appearance as musical guest. Sketches include Christmas Serial, Girlfriends Talk Show with Amy Adams and One Direction, Tenderfield Video Christmas Card, Sam/Smith Dr. Evil Cold Open and Office Christmas Party.

Kevin Hart hosts Saturday Night Live for the second time while Sia makes her debut as musical guest. Sketches include MLK Cold Open, Kevin Hart Monologue, Calvin Klein Ad, Why'd You Post That, Bushwick, Brooklyn 2015 and Kevin's Son.

Blake Shelton pulls double duty as host and musical guest on Saturday Night Live. Sketches include Blake Shelton's Hee-Haw Monologue, Farm Hunk, Wishin' Boot, Celebrity Family Feud and Weekend Update: Riblet.

J.K. Simmons makes his hosting debut while D'Angelo serves as musical guest. Sketches include Super Bowl Shut Down, J.K. Simmons Monologue, Teacher Snow Day, Totino's Super Bowl Commercial and The Jay Z Story.

Actress Dakota Johnson hosts SNL for the first time while Alabama Shakes returns as musical guest. Sketches include Giuliani Cold Open, Father Daughter Ad, Say What You Wanna Say, Press Junket, I Can't and Emergency Room.

Host Chris Hemsworth and musical guest Zac Brown Band make their SNL debuts. Sketches include American Express Ad, Empire Promo, Avengers News Report, Porn Stars: Dolce & Gabbana and Reality House.

Dwayne Johnson hosts for the fourth time while musical guest George Ezra makes his SNL debut. Sketches include The Rock Obama Cold Open, Dwayne Johnson's Franchise Viagra Monologue, New Disney Movie, The Jungle, Pepboys and Improv Show.

Michael Keaton hosts for the third time while musical guest Carly Rae Jepsen makes her SNL debut. Sketches include Michael Keaton Tribute Monologue, Prom Queen, Easter Hotline, Neutrology Music Video, Weekend Update: Pete Davidson on The Walking Dead Season Finale and Easter Candy.

Taraji P. Henson makes her hosting debut alongside second-time musical guest Mumford & Sons. Sketches include Hillary Election Video Cold Open, Taraji P. Henson's I Made It Monologue, Game of Thrones, Sesame Street Promo and Weekend Update: Jacob the Bar Mitzvah Boy Explains Passover.

Scarlett Johansson hosts for the fourth time alongside musical guest Wiz Khalifa in his SNL debut. Sketches include Mayweather-Pacquiao Cold Open, Orioles, Girlfriends Talk Show: Prom Queen Camden, Virgin Flight, Blazer and Weekend Update: Ruth Bader Ginsburg on Marriage Equality.

Reese Witherspoon makes her second appearance as host alongside musical guest Florence + the Machine. Sketches include 2016 Republicans Cold Open, Mother's Day Apologies Monologue with Reese Witherspoon, Picture Perfect, High School Theatre Show and Whiskers R' We Spring Cat Giveaway.

Louis C.K. returns as host for the third time while Rihanna makes her fifth appearance as musical guest. Sketches include Summertime Cold Open, Louis C.K. Monologue, Police Lineup, This Is How I Talk, Wood PSA and The Shoemaker & the Elves.