Sean Patrick Murphy (born 1971) is an American actor, writer, and producer. A graduate of Marquette University's College of Communication (1994), he is best known for playing the Shuttle Co-Pilot in Avatar (2009) and for starring in and writing the web series Poop Notice (2013–2015). He has been married to Jennifer Simpson since 21 September 2002. His filmography includes: Avatar (2009) (Zoe Saldaña, Sam Worthington); Thank You for Smoking (2005) (Aaron Eckhart, Jamie Foxx); The House (2017) (Will Ferrell, Amy Poehler); Jack Frost 2: Revenge of the Mutant Killer Snowman (2000) (Erica Cerra, Robert Hays); For All Mankind (2023–2024) (Joshua Malina, Jodi Balfour); Matlock (2026) (John Stamos, Sophia Mitri Schloss); NCIS: Los Angeles (2013–2016) (Chris O'Donnell, Daniela Ruah); The West Wing (1999) (Rob Lowe, Dulé Hill).