Ghosts is returning for a fourth series, star Katy Wix has confirmed.

The actor, who plays Mary in the BBC One sitcom, told rapper-actor Scroobius Pip on his podcast that production on the show resumes in January. The backstory of her character, a Stuart-era witch trial victim, is one of the few deaths yet to be the focus of an episode.

Martha Howe-Douglas, who plays the Edwardian former occupant of Button House, Lady Fanny Button, remarked of a fourth series last month that "there may be one in the offing", as she revealed Jennifer Saunders portrays her mother in the imminent Christmas special.

Also starring Charlotte Ritchie, Kiell Smith-Bynoe, Lolly Adefope, Mathew Baynton, Simon Farnaby, Jim Howick, Laurence Rickard and Ben Willbond, Ghosts has been a critical and ratings hit with cross-generational viewing appeal.

Series 3 began with 2.7 million overnight viewers and averaged 1.84 million over the course of the series, though many more will have watched on catch-up. The show has also spawned a US remake on the CBS channel.

A BBC spooksperson declined to comment to British Comedy Guide on rumours that two further series have been commissioned.

Wix, currently starring in Stath Lets Flats on Channel 4, also told Pip that she will appear in writer-comedian Jack Rooke's semi-autobiographical sitcom Big Boys for the channel, "a really lovely, sweet show", alongside Derry Girls' Dylan Llewellyn, Plebs' Jon Pointing and King Gary's Camille Coduri.

Meanwhile, she is in discussions to adapt her recently published book, Delicacy: A Memoir About Cake and Death, for television, potentially starring in the project too.

In her acclaimed autobiography, which is structured around her experiences eating cake, she recounts the loss of loved ones and almost dying in a car crash. And she is hoping to write another book as well.

"I've written a script, kind of based on the book, roughly, that I'm just chatting to people about now" she told Pip. "It's got some interest, so we'll see. That would be a dream come true to write something and get it made. And I'm just sort of thinking about what another book might be."

Adapting Delicacy with another writer, she told the Sunday Post this weekend that: "I'm trying to write a few different TV scripts at the moment - it feels like a nice contrast from the solitude of writing the book. They are a bit more collaborative and it takes the pressure off.

"It also feels busier in your head, rather than just you and your thoughts going over and over.

"One script I'm working on just now, I feel I would be quite central in it as an actor, but I also like the idea of writing something for teenagers or people in their early 20s as the protagonists, so it's lovely to just be the writer and not worry about performing it. It's lovely to do both."