American actor known for his roles as gangster Mickey Doyle in the HBO period drama series Boardwalk Empire (2010-2014), writer Thomas Yates in the Netflix political drama series House of Cards (2015-2017), and attorney David Tellis in the Starz anthology drama series The Girlfriend Experience (2016). Sparks has also starred in the films Deception (2008), Afterschool (2008), The Missing Person (2008), Mud (2012), Parkland (2013), Stealing Cars (2015), Thoroughbreds (2017), and The Greatest Showman (2017).
Sparks is married to actress Annie Parisse, after meeting in 2005. Together they have two children, son Emmett (born 2009), and daughter Lydia (born 2014). Sparks has diabetes mellitus type 1 and works with the Juvenile Diabetes Research Foundation. He is good friends with fellow actor Michael Shannon.
Link to Wikipedia biography