William Joseph "Billy" Baldwin (born February 21, 1963) is an American actor, producer, and writer, known for his starring roles in such films as Flatliners
(1990), Backdraft (1991), Sliver
(1993), Fair Game (1995), Virus
(1999), Double Bang
(2001), as Johnny 13 in Danny Phantom (2004–2007), Art Heist
(2004), The Squid and the Whale (2005), as Senator Patrick Darling in the TV drama Dirty Sexy Money (2007–2009) on ABC, Justice League: Crisis on Two Earths
(2010), and now Baldwin is currently a regular guest on Gossip Girl as William van der Woodsen and Parenthood as Gordon Flint. Billy's most recent role was as lead detective Brian Albert in the Lifetime Original Movie The Craigslist Killer.