Katherine Parkinson's 'Sitting' will air on BBC Four on Wednesday 7th April, at 10:30pm.
The show is an adaptation of her play of the same name. 'Sitting' is a comedy drama about three very different people, who are connected when they sit for portraits with painter John. It had a sell-out run at the Edinburgh Fringe, before transferring to the Arcola Theatre.
Katherine will also star in the lead role of Mary, previously played by Hayley Jayne Standing.