In the days before 30 Rock celebrities made cameo appearances on America's greatest comedy institution, Saturday Night Live (and still do) but almost everyone from Al Gore to Moby to Whoopi Goldberg and more are making appearances on 30 Rock.
Here is a list of cameos on 30 Rock from the evident and well-known to the not so well-known, in chronological order of 30 Rock season appearance. All Cameos are as Himself/Herself unless otherwise written:
- Donald Glover (As Young PA in Jack-Tor: Season 1, Episode 5)
- Conan O' Brien (Tracy Does Conan: Season 1, Episode 7)
- Aubrey Plaza (As NBC Page in Tracy Does Conan: Season 1, Episode 7)
- Whoopi Goldberg (The Rural Juror: Season 1, Episode 10)
- John McEnroe (The Head and the Hair: Season 1, Episode 11)
- Isabella Rossellini (As Bianca in Black Tie: Season 1, Episode 12)
- Paul Reubens (As Gerhardt Hapsburg in Black Tie: Season 1, Episode 12)
- Chris Matthews (Hard Ball: Season 1, Episode 15)
- Tucker Carlson (Hard Ball: Season 1, Episode 15)
- Wayne Brady (As Steven Black in The Source Awards: Season 1 Episode 16)
- LL Cool J (As Ridikolus in The Source Awards: Season 1, Episode 16)
- Maury Povich (Fireworks: Season 1, Episode 18)
- Jason Sudeikis (As Floyd DeBarber in Several Episodes: Seasons 1-4)
- Jerry Seinfeld (SeinfeldVision: Season 2, Episode 1)
- Rachel Dratch (Various Roles: Several Episodes, Season 1)
- Carrie Fisher (As Rosemary Howard in Rosemary’s Baby: Season 2, Episode 4)
- Al Gore (Greenzo: Season 2, Episode 5) and (Sun Tea: Season 4, Episode 6)
- David Schwimmer (As Greenzo in Greenzo: Season 2, Episode 5)
- Fred Armisen (As Raheem Haddad in Somebody to Love: Season 2, Episode 6)
- James Carville (Secret and Lies: Season 2, Episode 8)
- Reshma Shetty (Secret and Lies: Season 2, Episode 8)
- Matthew Broderick (Cooter: Season 2, Episode 15)
- Oprah Winfrey (Believe in the Stars: Season 3, Episode 2)
- Jennifer Anniston (As Claire in The One with the Cast of "Night Court": Season 3, Episode 3)
- Steve Martin (As Gavin Volure in Gavin Volure: Season 3, Episode 4)
- Peter Dinklage (As Stuart Lagrange in Senor Macho Solo, Season 3, Episode 7)
- Larry King (Larry King: Season 3, Episode 12)
- John Lithgow (Goodbye, My Friend: Season 3, Episode 13)
- Calvin Klein (The Bubble: Season 3, Episode 15)
- Steve Buscemi (The Natural Order: Season 3, Episode 20)
- Moby (Kidney Now!: Season 3, Episode 22)
- Beastie Boys (Mike-D and Ad-Rock) (Kidney Now!: Season 3, Episode 22)
- Elvis Costello (Kidney Now!: Season 3, Episode 22)
- Mary J. Blige (Kidney Now!: Season 3, Episode 22)
- Sheryl Crowe (Kidney Now!: Season 3, Episode 22)
- Steve Earle (Kidney Now!: Season 3, Episode 22)
- Wyclef Jean (Kidney Now!: Season 3, Episode 22)
- Norah Jones (Kidney Now!: Season 3, Episode 22)
- Talib Kweli (Kidney Now!: Season 3, Episode 22)
- Cyndi Lauper (Kidney Now!: Season 3, Episode 22)
- Michael McDonald (Kidney Now!: Season 3, Episode 22)
- Rhett Miller (Kidney Now!: Season 3, Episode 22)
- Robert Randolph (Kidney Now!: Season 3, Episode 22)
- Clay Aiken (Kidney Now!: Season 3, Episode 22)
- Sara Bareilles (Kidney Now!: Season 3, Episode 22)
- Salma Hayek (As Elisa: Several Episodes, Season 3)
- Jon Hamm (As Dr Baird: Several Episodes, Season 3)
- Jimmy Fallon (Stone Mountain: Season 4, Episode 3)
- Betty White (Stone Mountain: Season 4, Episode 3)
- Julianne Moore (As Nancy Donovan in Secret Santa: Season 4, Episode 8 and Winter Madness: Season 4, Episode 11)
- Larry Wilcox (Secret Santa: Season 4, Episode 8)
- James Franco (Klaus and Greta: Season 4, Episode 9)
- Elizabeth Banks (As Avery Jessup: Several Episodes, Seasons 4, 5, & 6)
- Jon Bon Jovi (Anna Howard Shaw Day: Season 4, Episode 13)
- Buzz Aldrin (The Moms: Season 4, Episode 20)
- Matt Damon (As Carol Burnett: Several Episodes, Seasons 4 & 5)
- Queen Latifah (As Congresswoman Regina Bookman in Let’s Stay Together: Season 5, Episode 3)
- Rob Reiner (As Congressman Rob Reiner in Let’s Stay Together: Season 5, Episode 3)
- Julia Louis-Dreyfus (Live Show: Season 5, Episode 4)
- Bill Hader (Live Show: Season 5, Episode 4)
- Kelsey Grammer (As Frasier Crane in Reaganing: Season 5, Episode 5)
- Robert DeNiro (Operation Righteous Cowboy Lightning: Season 5, Episode 12)
- Michael Keaton (As Tom in 100: Season 5, Episode 20)
- Tom Hanks (100: Season 5, Episode 20)
- Regis Philbin (100: Season 5, Episode 20)
- Rachel Ray (100: Season 5, Episode 20)
- Condoleezza Rice (Everything Sunny All The Time Always: Season 5, Episode 21)
- James Mardsen (As Criss Chros: Several Episodes, Seasons 6 & 7)
- Andy Samberg (The Ballad of Kenneth Parcell: Season 6, Episode 4)
- Emma Stone (The Ballad of Kenneth Parcell: Season 6, Episode 4)
- Nick Cannon (The Ballad of Kenneth Parcell: Season 6, Episode 4)
- Suze Orman (Today You Are a Man: Season 6, Episode 5)
- Jim Carrey (Leap Day: Season 6, Episode 9)
- Susan Sarandon (As Lynn Onkman in Alexis Goodlooking and the Case of the Missing Whisky: Season 6, Episode 10)
- Weird Al Yankovic (Kidnapped by Danger: Season 6, Episode 14)
- Cynthia Nixon (Kidnapped by Danger: Season 6, Episode 14)
- Catherine O'Hara (Governor Dunston: Season 7, Episode 2)
- Bryan Cranston (Governor Dunston: Season 7, Episode 2)
- Ryan Lochte (Stride of Pride: Season 7, Episode 3)
- Don Cheadle (Unwindulax: Season 7, Episode 4)
- Wendy Williams (My Whole Life is Thunder: Season 7, Episode 8)
- Octavia Spencer (Game Over: Season 7, Episode 9)
- Nancy Pelosi (Hogcock!: Season 7, Episode 12)