Actor Bradley Whitford has been cast as Rhys Ifans' replacement in upcoming comedy series Happyish.

The West Wing star will play the boss and mentor of Steve Coogan's character in the dark comedy, about the pursuit of happiness.

Coogan sign on to the show last month (Oct14) to step in for original star Philip Seymour Hoffman, who died of a drug overdose in February (14).

Actress Kathryn Hahn, who shot a pilot episode alongside Hoffman in 2013, will return to the show to play Coogan's onscreen wife.

The new pilot is slated to begin filming in New York next month (Dec14).