Joanna Lumley is working with Sky Television to develop a new comedy show.
Few details are currently known about the format, however the title has been revealed as Harmony and it is thought to be a sitcom project.
Audience tickets have been released for an early run-through which is due to take place at The London Studios this July.
The application page features a message from Lumley. She says: "I am working on a Sky project that I want to workshop with an audience, so I hope that you can join us on Wednesday 22nd July."
She adds: "I think it will be very funny and I hope you will enjoy being at the start of something new."
Also involved in Harmony is Anthony Head, Murder In Successville star Tom Davis, Jordan Stephens (the Rizzle Kicks singer, who has recently turned his hand to acting) and young actress Bebe Cave (Millie in Trying Again).
If the project makes it to TV, this will not be the first time Lumley has worked with Anthony Head. The You, Me & Them actor previously appeared alongside Lumley in the 2007 series of Sensitive Skin, the low-key BBC sitcom starring Lumley as an affluent woman who works in an art gallery.
Lumley's other current comedy projects include playing Fenella in the Terry Jones film Absolutely Anything, filming the low-budget 2016 movie The Man You're Not, and preparing to reprise her iconic comedy role as Patsy Stone in Ab Fab: The Movie.