Jon Hamm, Connie Britton Jon Hamm, Connie Britton

Mad Men and American Horror Story topped the Primetime Emmy Awards nominations Thursday with 17 each, while a slew of freshmen faces enter the field.

Mad Men will aim for an unprecedented five-peat in Best Drama Series, which would also give it the most wins in the category. It is up against Boardwalk Empire, Breaking Bad, Downton Abbey, Game of Thrones and Homeland.

Downton and miniseries Hatfields & McCoys followed with 16 nods, while breakout hit Homeland scored eight, including nods for leads Damian Lewis and Claire Danes.

Jimmy Kimmel to host Emmy Awards

Horror Story

, which entered in the TV series/miniseries race, is up against Game Change, Hatfields & McCoys, Luther, Hemingway & Gellhorn and Sherlock: Scandal in Belgravia.
Two-time defending comedy series champ Modern Family, which earned 14 nods, will vie for a three-peat against three-time champ 30 Rock, The Big Bang Theory, Curb Your Enthusiasm and new series Girls and Veep.Girls' and Veep's lead stars Lena Dunham and Julia Louis-Dreyfus also nabbed lead comedy actress nods. Joining them are fellow newbie Zooey Deschanel (New Girl), defending champ Melissa McCarthy (Mike & Molly), past champs Edie Falco (Nurse Jackie), Tina Fey (30 Rock) and Amy Poehler (Parks and Recreation).Among the snubs were American Idol in reality-competition series and House's Hugh Laurie — in his final year — for lead drama actor. Check out the nominations below.The 64th Primetime Emmy Awards, hosted by Jimmy Kimmel ,will air Sunday, Sept. 23 at 8 p.m. ET/5 p.m. PT on ABC.Drama Series
Boardwalk Empire
Breaking Bad
Downton Abbey
Game of Thrones
Mad Men
Comedy Series
The Big Bang Theory
Curb Your Enthusiasm
Modern Family
30 Rock
Lead Actor in a Drama Series
Hugh Bonneville, Downton AbbeySteve Buscemi, Boardwalk EmpireBryan Cranston, Breaking BadMichael C. Hall, DexterJon Hamm, Mad MenDamian Lewis, Homeland
Lead Actress in a Drama Series
Kathy Bates, Harry's LawGlenn Close, Damages
Claire Danes, HomelandMichelle Dockery, Downton AbbeyJulianna Margulies, The Good WifeElisabeth Moss, Mad MenSupporting Actor in a Drama Series
Jim Carter, Downton AbbeyBrendan Coyle, Downton AbbeyPeter Dinklage, Game of ThronesGiancarlo Esposito, Breaking BadJared Harris, Mad MenAaron Paul, Breaking Bad
Supporting Actress in a Drama Series

Christine Baranski
, The Good WifeJoanne Froggatt, Downton AbbeyAnna Gunn, Breaking BadChristina Hendricks, Mad MenArchie Panjabi, The Good WifeMaggie Smith, Downton Abbey

Lead Actor in a Comedy Series

Alec Baldwin
, 30 RockDon Cheadle, House of LiesLouis C.K., LouieJon Cryer, Two and a Half MenLarry David, Curb Your EnthusiasmJim Parsons, The Big Bang Theory
Lead Actress in a Comedy Series
Zooey Deschanel, New GirlLena Dunham, GirlsEdie Falco, Nurse JackieTina Fey, 30 RockJulia Louis-Dreyfus, VeepMelissa McCarthy, Mike & MollyAmy Poehler, Parks and RecreationSupporting Actor in a Comedy SeriesTy Burrell, Modern FamilyJesse Tyler Ferguson, Modern FamilyMax Greenfield, New GirlBill Hader, Saturday Night LiveEd O'Neill, Modern FamilyEric Stonestreet, Modern FamilySupporting Actress in a Comedy Series
Mayim Bialik, The Big Bang TheoryJulie Bowen, Modern Family
Kathryn Joosten, Desperate HousewivesSofia Vergara, Modern Family
Merritt Wever, Nurse JackieKristen Wiig, Saturday Night LiveTV Movie/MiniseriesAmerican Horror StoryGame ChangeHatfields & McCoys
Hemingway & GellhornSherlock: Scandal in BelgraviaActor in a TV Movie/MiniseriesKevin Costner, Hatfields & McCoys
Benedict Cumberbatch, Sherlock: Scandal in BelgraviaIdris Elba, Luther
Woody Harrelson, Game ChangeClive Owen, Hemingway & Gellhorn
Bill Paxton, Hatfields & McCoysActress in a TV Movie/Miniseries
Connie Britton, American Horror Story
Ashley Judd, Missing
Nicole Kidman
, Hemingway & GellhornJulianne Moore, Game ChangeEmma Thompson, The Story of Lunch

Supporting Actor in a TV Movie/Miniseries
Tom Berenger, Hatfields & McCoysMartin Freeman, Sherlock: Scandal in BelgraviaEd Harris, Game Change
Denis O'Hare, American Horror StoryDavid Strathairn, Hemingway & Gellhorn

Supporting Actress in a TV Movie/Miniseries
Frances Conroy, American Horror StoryJudy Davis, Page Eight
Jessica Lange, American Horror StorySarah Paulson, Game Change
Mare Winningham, Hatfields & McCoysReality-Competition Program
The Amazing RaceDancing with the StarsProject RunwaySo You Think You Can DanceTop ChefThe VoiceReality HostTom Bergeron, Dancing with the StarsCat Deeley, So You Think You Can DancePhil Keoghan, The Amazing RaceRyan Seacrest, American IdolBetty White, Betty White's Off Their Rockers
Variety, Music or Comedy SeriesThe Colbert Report
The Daily Show with Jon Stewart
Jimmy Kimmel Live!
Late Night with Jimmy Fallon

Real Time with Bill Maher
Saturday Night Live