Bridesmaids’ star Chris O’Dowd is set to star in a documentary-style family comedy series for HBO. Christopher Guest of Spinal Tap fame is behind the comedy which received a straight-to-series order from the network, according to The Hollywood Reporter.

The comedy called Family Tree tells the story of Tom Chadwick, played by O’Dowd, who after losing his job and splitting up with his girlfriend, starts looking at his family history. He inherits a mysterious box from a great aunt which reveals hidden family characters.

Guest, who created the series with partner Jim Piddock, will direct and is expected to appear. Eight episodes have been ordered and the series will be broadcast simultaneously on BBC2.