In films , Jackson most notably portrayed 9/11 victim and hero Mark Bingham in the 2006 Academy Award nominated '' United 93 '' which earned him the Boston Society of Film Critics 2006 award for Best Ensemble Cast . He has also appeared in several other films including : '' Curiosity '' ( 2005 ) , '' Hysteria '' ( 2010 ) , '' Smile '' ( 2011 ) the critically lauded '' The Green '' ( opposite Julia Ormond and Illeana Douglas ) , and 2012 Sundance Film Festival selection '' Price Check '' ( with Parker Posey ) . He portrayed Greta Gerwig 's boyfriend Roger in the 2012 Fox Searchlight Pictures film '' Lola Versus '' . In 2013 , he starred in the HBO biopic of Liberace , '' Behind the Candelabra '' with Michael Douglas and Matt Damon . He also appeared in the independent films '' Mutual Friends '' ( 2013 ) , '' Lucky Stiff '' ( 2014 ) and '' A Beautiful Now '' ( 2015 )
9/11
September 11 attacks
Cheyenne Jackson