ITV confirmed this morning that the period drama, which is currently in its third instalment, will be back for a new 10-part series.
As fans of the show will know, alluring socialite Lady Mae is not in this current series, as former Coronation Street actress Katherine was on maternity leave when filming began.
There's still a lot of unfinished business between Lady Mae and her estranged husband Lord Loxley, so we can't wait to see it all unfold when she returns!
Mr Selfridge is inspired by the turbulent life of charismatic American retail entrepreneur, Harry Gordon Selfridge, played by Jeremy Piven.
The fourth series will focus on Harry's dramatic fall as he loses hold on the empire and social status that he worked so hard to create.
Filming will take place on location in London on the lavish replica of the Selfridge's shop floor that is housed in a former carpet warehouse in North West London.
Kate Lewis, executive producer for ITV Studios, said: "We're delighted to be embarking on production of the fourth series of Mr Selfridge and thrilled to be welcoming back Katherine Kelly along with introducing some talented new faces.
"This series marks a dramatic turn in fortunes for Harry as he loses grip on his empire. It's a bit of a game changer for all the characters in the series."
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