21 shows this season -
Fifth time alumni host - Tina Fey (co-host with Amy)
Fourth time hosts - Melissa McCarthy, Jonah Hill
Third time alumni host - Julia Louis-Dreyfus
Third time host - Miley Cyrus
Second time alumni hosts - Tracy Morgan, Amy Poehler (co-host with Tina)
Second time hosts - Donald Trump, Matthew McConaughey, Chris Hemsworth, Drake
First time alumni host - Fred Armisen
First time sorta-alumni host - Larry David
First time hosts - Amy Schumer, Elizabeth Banks, Ryan Gosling, Adam Driver, Ronda Rousey, Ariana Grande, Peter Dinklage, Russell Crowe, Brie Larson
Alumni guest appearances
Martin Short (4/Trump)
Mike O'Brien (5/Banks and 17/Crowe)
Mike Myers (7/Gosling)
Will Ferrell (8/Hemsworth)
Maya Rudolph (9/Tina & Amy) and (21/Fred)
Fred Armisen (10/Driver, to intro David Bowie clip)
Tina Fey (11/Rousey)
Ben Stiller (12/David)
Jason Sudeikis (14/Hill and 17/Crowe and 21/Fred)
(Jimmy Fallon, hosted the Prince tribute special)
Dana Carvey (19/Larson)
Chris Rock (20/Drake)
Andy Samberg (21/Fred)
Larry David was a writer for and occasional performer in Season 10, 1984-1985.
This season, he played Bernie Sanders in shows 3, 4, 12 (which he hosted), 15, 18 and 21.
Darrell Hammond still holds the record for staying in the cast the longest, 14 seasons.
This was his second season as the show's announcer.
He did his Bill Clinton in shows 1, 13, and 21.
He did his Trump in shows 4, 9, 10, 11, 14, 15, 16, 19, and 20.
Taran Killam did Trump in shows 1, 4, and 7 (and was then Ted Cruz the rest of the season).
Miley Cyrus (also host), The Weeknd, Demi Lovato, Sia, Disclosure (with Lorde and Sam Smith), Adele, Leon Bridges, Chance the Rapper, Bruce Springsteen (with Paul McCartney), Chris Stapleton, Selena Gomez, The 1975, Kanye West, Future, Ariana Grande (also host), Gwen Stefani, Margo Price, Nick Jonas, Alicia Keys, Drake (also host), Courtney Barrett.
Guest cameos (not including Larry David or former cast members)
1 - Hillary Clinton
3 - Alec Baldwin, Jack McBrayer, Jane Krakowski
6 - JJ Abrams, Daisy Ridley, John Boyega, Jon Hamm, Emma Stone, Michael Buble
9 - Amy Schumer, Gayle King
10 - Liev Schreiber
12 - Bernie Sanders, Owen Wilson
17 - Al Sharpton
18 - Tony Hale
21 - Carrie Brownstein