Emmerdale fans were left stunned during Tuesday night's episode, as a very familiar face popped up.
English actress Louise Jameson arrived in the Dales as Rhona Goskirk's mother Mary - and viewers recognised her straight away.
Louise starred in EastEnders from 1998 until 2000 as Rosa di Marco and was embroiled in several dramatic storylines.
Unfortunately her character won't be able to return to Walford as Rosa died off-screen in 2002, to coincide with her son Beppe's departure from Albert Square - so Louise headed to ITV instead.
Her first scene saw her complaining to Rhona (Zoe Henry) about her mattress she slept on the night before.
"You've still not said how long you're gonna be staying for?" Rhona asked Mary, but she completely avoided the question.
Mary then started blasting Rhona's baking skills as a youngster and told her: "You were such a peculiar little child."
Rhona later admitted that she wasn't sure why her mother had even showed up in the village, but said: "I intend to find out."
It was confirmed back in January that 70-year-old Louise would be joining Emmerdale.
Described as a "no nonsense" character, Mary has a strained relationship with her daughter as Rhona believes she can never live up to her mum's high expectations.
Some Emmerdale viewers were shocked to see a former EastEnders actress and on their screens and took to Twitter to comment.
"Oh! It’s thingy from Eastenders! #Emmerdale," one person tweeted.
Another said: "Ooooh Louise Jameson on Emmerdale!! #drWho #emmerdale."
Someone else joked: "Rosa Di Marco needs a yorkshire accent #emmerdale."
And a fourth viewer posted: "does this mean rhona is bepe dimarco's sister?#emmerdale."
Got any theories or thoughts on the storyline? Let us know in the comments section below
Emmerdale airs weeknights at 7pm on ITV, with an extra episode at 8pm on Thursdays.
