Christopher Guest Comedy Ordered by HBO

"Family Tree" will star Chris O'Dowd as a man who begins exploring his lineage after inheriting a box of belongings from a great aunt

Christopher Guest is bringing his fake-documentary wit to HBO.

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Ordered direct to series, the single-camera "Family Tree" centers on Tom Chadwick, played by "Bridesmaids" cop Chris O'Dowd, a 30-year-old man who loses his job and his girlfriend and begins investigating his family's unusual past after inheriting a mysterious box of belongings from a great aunt he'd never met.

Guest will direct. He and his frequent collaborator Jim Piddock ("Best in Show," "A Mighty Wind") created and wrote the project and will appear on the series, as well as executive-produce, along with Karen Murphy, who has produced Guest films such as "This Is Spinal Tap," "A Mighty Wind" and "Best in Show." 

A Lucky Giant, which is a part of NBC Universal International Television Production, will produce the project.

BBC Two will air the program in the U.K.