David Nkrumah Liebe Unger Hart (born 19 April 1955; also credited as D.L. Hart) is an outsider musician, street performer, sign painter, artist, puppeteer and actor. He is best known for his role as a puppeteer on The Junior Christian Science Bible Lesson Program, a Los Angeles-based public-access television cable TV program. He also frequently appears on the television shows The Del Talk Show, Tim and Eric Awesome Show, Great Job! as well as Tim and Eric Nite Live!. He has also appeared live with them on Tim and Eric's Awesome Tour. He can often be seen performing with his puppet "Doug the Dog" just outside the Hollywood Bowl after shows, as well as at the La Brea Tar Pits and Music Center of Los Angeles, and is known to many concert goers simply as the "puppet man". He made an appearance on The Daily Show with Jon Stewart in 2004 and again 2009, as well as on Jimmy Kimmel Live! in 2004. In 1990, he made an appearance in Golden Girls and in 1993 in Wings. He has also been known at times as David Hart, David Unger Hart, David King Liebe Hart and DL Hart.
He was divorced in 1994, and is vocal about his abstinence from smoking, alcohol, drugs and his dislike of rap music— but other parts of his life, especially since his arrival in Hollywood in 1976, are less clear. In interviews he revealed that he served as a cook in the Navy at one point in his life. He claims to have gotten his start in Hollywood touring with comedian Robin Williams and from making an appearance on The Gong Show in 1977.
Being a talented puppeteer, David has develouped a great passion for the art. During an interview with Jimmy Kimmel, David stated he first developed this passion for puppeteering upon attending church Sunday school in his youth.
He also appeared in a commentary on Tim And Eric Awesome Show, Great Job! Season One DVD. Throughout late April and early May 2008 he performed live as part of T&E's Awesome Tour 2008. He also appears in two episodes of a third season of Tim and Eric's Awesome Show, Great Job!.
In 2004, David Hart was featured in the documentary Public Access Hollywood.He has featured independent actress Rachel Galvin on his show as a host.