<Ul> <Li> Kiefer Sutherland as Thomas `` Tom '' Kirkman ( season 1 - present ) , the President of the United States and the former Secretary of Housing and Urban Development , who is sworn in following an unprecedented attack . </Li> <Li> Natascha McElhone as Alexandra `` Alex '' Kirkman ( season 1 - 2 ) , Tom 's devoted wife and a former immigration lawyer , who finds herself thrust into a role she was not prepared to take on . </Li> <Li> Adan Canto as Aaron Shore ( season 1 - present ) , the White House Deputy Chief of Staff , who becomes Chief of Staff in the days following the bombing ; he resigns after being interrogated about the attack . He works as an aide to Speaker of the House Kimble Hookstraten before returning to the White House as Tom 's National Security Advisor . </Li> <Li> Italia Ricci as Emily Rhodes ( season 1 - present ) , Tom 's Chief of Staff from his days as HUD Secretary , who becomes his Special Advisor and , following Aaron 's resignation , his Chief of Staff . </Li> <Li> LaMonica Garrett as Mike Ritter ( season 1 - present ) , a Secret Service agent originally assigned to Tom 's personal security detail , who tries to ensure the Kirkman family 's safety following the bombing . </Li> <Li> Tanner Buchanan as Leo Kirkman ( season 1 ; recurring season 2 ) , Tom 's teenaged son , who does everything he can to support his little sister , but struggles to keep it together after a shocking secret about his past comes to light . </Li> <Li> Kal Penn as Seth Wright ( season 1 - present ) , a speechwriter who initially harbors doubts about Tom 's abilities to lead the country but quickly becomes one of his closest advisors and the new White House Press Secretary . </Li> <Li> Maggie Q as Hannah Wells ( season 1 - present ) , an FBI agent assigned to investigate the events surrounding the bombing who suspects that the people responsible are not yet finished with what they started . </Li> <Li> Paulo Costanzo as White House Political Director Lyor Boone ( season 2 - present ) , a highly skilled yet socially inept political consultant hired to help develop the Kirkman administration 's political strategy . </Li> <Li> Zoe McLellan as White House Counsel Kendra Daynes ( season 2 - present ) </Li> <Li> Ben Lawson as Damian Rennett ( season 2 - present ) , an MI6 agent assigned to find the bombing 's chief architect who develops a competitive relationship with Wells . </Li> </Ul>
<Ul> <Li> Kiefer Sutherland as Thomas `` Tom '' Kirkman ( season 1 - present ) , the President of the United States and the former Secretary of Housing and Urban Development , who is sworn in following an unprecedented attack . </Li> <Li> Natascha McElhone as Alexandra `` Alex '' Kirkman ( season 1 - 2 ) , Tom 's devoted wife and a former immigration lawyer , who finds herself thrust into a role she was not prepared to take on . </Li> <Li> Adan Canto as Aaron Shore ( season 1 - present ) , the White House Deputy Chief of Staff , who becomes Chief of Staff in the days following the bombing ; he resigns after being interrogated about the attack . He works as an aide to Speaker of the House Kimble Hookstraten before returning to the White House as Tom 's National Security Advisor . </Li> <Li> Italia Ricci as Emily Rhodes ( season 1 - present ) , Tom 's Chief of Staff from his days as HUD Secretary , who becomes his Special Advisor and , following Aaron 's resignation , his Chief of Staff . </Li> <Li> LaMonica Garrett as Mike Ritter ( season 1 - present ) , a Secret Service agent originally assigned to Tom 's personal security detail , who tries to ensure the Kirkman family 's safety following the bombing . </Li> <Li> Tanner Buchanan as Leo Kirkman ( season 1 ; recurring season 2 ) , Tom 's teenaged son , who does everything he can to support his little sister , but struggles to keep it together after a shocking secret about his past comes to light . </Li> <Li> Kal Penn as Seth Wright ( season 1 - present ) , a speechwriter who initially harbors doubts about Tom 's abilities to lead the country but quickly becomes one of his closest advisors and the new White House Press Secretary . </Li> <Li> Maggie Q as Hannah Wells ( season 1 - present ) , an FBI agent assigned to investigate the events surrounding the bombing who suspects that the people responsible are not yet finished with what they started . </Li> <Li> Paulo Costanzo as White House Political Director Lyor Boone ( season 2 - present ) , a highly skilled yet socially inept political consultant hired to help develop the Kirkman administration 's political strategy . </Li> <Li> Zoe McLellan as White House Counsel Kendra Daynes ( season 2 - present ) </Li> <Li> Ben Lawson as Damian Rennett ( season 2 - present ) , an MI6 agent assigned to find the bombing 's chief architect who develops a competitive relationship with Wells . </Li> </Ul>
who plays the president 's son on designated survivor
who plays the president 's son on designated survivor
Tanner Buchanan
Tanner Buchanan