Claim: Cheyenne Jackson had a guest role on 30 Rock.

Cheyenne David Jackson -LRB- born July 12 , 1975 -RRB- is an American actor and singer-songwriter . His credits include leading roles in Broadway musicals and other stage roles , as well as film and television roles , concert singing , and music recordings .   After beginning his acting career in regional theatre in Seattle , he moved to New York and was an understudy in Thoroughly Modern Millie -LRB- 2002 -RRB- and Aida -LRB- 2003 -RRB- . He next originated the role of Matthew in Altar Boyz -LRB- 2004 -RRB- . Jackson 's first leading role on Broadway was in All Shook Up -LRB- 2005 -RRB- , which earned him a Theatre World Award for `` Outstanding Broadway Debut . '' Since then , on the New York stage , he has starred in The Agony & the Agony -LRB- 2006 -RRB- , Xanadu -LRB- 2007 ; Drama League , Drama Desk nominations -RRB- , Damn Yankees -LRB- 2008 -RRB- , Finian 's Rainbow -LRB- 2010 ; Drama Desk nomination -RRB- , 8 -LRB- 2011 -RRB- , The Heart of the Matter -LRB- 2012 -RRB- and The Performers -LRB- 2013 -RRB- .   He has also appeared in a number of films , including the 2006 Academy Award-nominated United 93 , in which his portrayal of Mark Bingham earned him the Boston Society of Film Critics 2006 award for Best Ensemble Cast . He also had a leading role in the 2014 independent romantic comedy ensemble , Mutual Friends , and guest roles in television series such as NBC 's 30 Rock and Fox 's Glee . Most recently , Jackson starred in the FX Horror-anthology , American Horror Story , in its fifth and sixth seasons .   In concert , Jackson has sold out Carnegie Hall twice : The Power of Two in 2010 and Music of the Mad Men Era in 2011 . He also performs in cabaret . In addition to his Broadway cast albums , he has released three albums of popular music , including a joint album called The Power of Two with Michael Feinstein in 2008 . In 2012 , Jackson released two singles , `` Drive '' and `` Before You '' , from his 2013 album I 'm Blue , Skies . In 2016 , Jackson released his latest album , Renaissance , an album adapted and expanded from his solo concert Music of the Mad Men Era .