David Kenneth Harbour (born April 10, 1975) is an American actor. He has played supporting roles in films such as War of the Worlds (2005), Awake (2007), Revolutionary Road (2008), W.E. (2011), Knife Fight (2012), Parkland (2013), A Walk Among the Tombstones (2014), Black Mass (2015), Suicide Squad (2016), Sleepless (2017), and No Sudden Move (2021).