Two Oliviers later, her return to the small screen has been nothing short of triumphant, with a Bafta for Mrs Biggs and an OBE for services to drama to her name.
It’s been quite the journey for Smithy’s sister – yes that was her in Gavin & Stacey – but it’s a career that anyone who had a heart would celebrate.
Black Work (2015)
Smith leads the cast of ITV’s new three-part drama, playing a policewoman whose world is turned upside-down when her husband is killed while working undercover. Not content with the official line of enquiry into his murder, she takes it upon herself to track down his killer.
The C Word (2015)
Lisa Lynch’s real-life tale of her battle with cancer was adapted for the small screen by BBC1, with Smith taking on the role of the brave woman who blogged her way through treatment. Lynch wrote the best-selling book of the same name before passing away in 2013.
Stepping into the shoes of Liverpool’s beloved Cilla Black, Smith channelled the singer for another Bafta-nominated ITV drama. With Aneurin Barnard by her side as Bobby Willis, she didn’t just act – she performed all the songs too.
The 7.39 (2014)
Starring opposite The Walking Dead’s David Morrissey, Smith played Sally, an engaged woman who enjoyed a seemingly harmless flirtation with a married man on the morning commute. Little did they know what would happen next…
The Widower (2014)
Smith appeared in the first episode of Jeff Pope’s three-part thriller, starring Reece Shearsmith as murderer Malcom Webster. She played Webster’s first wife Claire, who he drugged and then killed in a car accident.
Mrs Biggs (2012)
ITV bought to life the story of Charmaine Biggs, the wife of Great Train Robber Ronnie, in 2012 with Smith leading the drama. The performance saw her win a Bafta for best actress in 2013.
Jonathan Creek (2009 – 2013)
Creative consultant Jonathan Creek solved crimes alongside Sheridan Smith’s Joey Ross between 2009 and 2013.
Gavin and Stacey (2008 – 2010)
Sheridan starred in hit BBC comedy Gavin and Stacey as Smithy’s sister Rudi, who also called herself Smithy. She was mainly seen wearing caps, doing the robot dance and serving fast food.
Love Soup (2005 – 2008)
Smith played shop assistant Cleo Martin in the drama, which followed Tamsin Greig’s character Alice as she tries – and fails – to find the perfect man.
Two Pints of Lager and a Packet of Crisps (2001 – 2009)
Playing cigarette and rich tea-loving Janet in long-running romcom Two Pints of Lager and a Packet of Crisps was something of a career defining role for Smith – and certainly the role she was best known for until recently.
Holby City (2001)
As well as starring in Heartbeat, Where the Heart It and The Royle Family, one of Sheridan’s first roles was as teenage stalker Miranda Locke in the long-running medical drama Holby City.
Black Work airs on ITV on Sunday June 21st from 9pm