Izzy Armstrong is a fictional character from the British ITV soap opera Coronation Street, played by Cherylee Houston. The character first appears on-screen on 16 April 2010; she is introduced as a new love interest for Kirk Sutherland (Andrew Whyment). Following her arrival, she gets a job at the Underworld factory. Upon her debut, she was heralded as the soap's first disabled regular character in 50 years. Izzy was the first member of the Armstrong family to be introduced, her father Owen and sister Katy arrived within two months after her first appearance.

In February 2021, after not being seen on air for a while, it was revealed Izzy had not and would not appear for a while due to Houston having to shield because of the COVID-19 pandemic, although she stated her intention to return when it is safe to do so. She briefly returned on 21 April and again on 7 June 2021 through video call.

Izzy grew up in a council house with her family. Her father Owen was faithful but her mother was an alcoholic and a drug addict who cheated on her husband. Izzy's mother left Owen for a man called Billy Jefferson. The character of Izzy was announced in early 2010 as a love interest for Kirk. It was announced that Izzy would be played by actress Cherylee Houston. Shortly afterwards the character's father was also confirmed to appear in Coronation Street in mid June 2010 along with her younger sister. Izzy is a wheelchair user. Commenting on her casting Cherylee Houston said "I’m really excited and well chuffed to be joining the show. I grew up with Coronation Street and I can’t wait to get start. I’m really looking forward to getting my teeth into the character."

Houston began filming in February 2010 and signed a contract for an initial seven episodes, which was soon extended for six months. Izzy is described as having a feisty and fiery personality. She is usually attracted to bad boys and has been known in the past to be a heartbreaker due to her troubled background and messy romantic history.

During the character's first episode she clashes with regulars such as Jason Grimshaw, Anna Windass and Gary Windass, establishing the character's strong personality. A few weeks later she clashes with other strong characters such as Liz McDonald to whom Liz takes a disliking. Izzy's surname was initially intended to be Butterfield, although by the transmission of her first episode it had been changed to Armstrong.

Upon her introduction to the programme, the character of Izzy was promoted as Coronation Street's first disabled regular, although Maud Grimes, who first appeared in 1993, also used a wheelchair. In one of Izzy's early scenes, viewers see Eddie Windass (Steve Huison) insult the feisty newcomer by telling Kirk: "You don't want to go out with a bird in a wheelchair." Asked how disabled viewers will have felt about the remark, Houston replied: "They were probably going, 'Thank God that's showing reality". Shortly after her first scenes producers were pleased with her impact and decided to introduce a family for her. Houston said in July 2012 that she is starting to adopt Izzy's accent, adding that she is a bit more diplomatic than Izzy is and does not fly off the handle as fast. Houston continued: "She can be quite dogmatic when she gets something between her teeth - she's always ready to bark!"

In April 2010, Izzy goes to The Rovers Return Inn for her date with Kirk Sutherland (Andrew Whyment), having arranged to meet him, via an online dating site. Disaster strikes when she spots Jason Grimshaw (Ryan Thomas) - who she believes to be Kirk as Kirk used Jason's photo on his profile, much to Jason's surprise. As Izzy storms out, she bumps into Gary Windass (Mikey North) and they argue. Gary takes a shine to her feistiness and when he bumps into her again later in the day, there's a clear spark. On 7 May, Kirk arranges another date with Izzy and this time, it goes well, as the conversation flows easily. She meets Fiz Stape (Jennie McAlpine) and Sean Tully (Antony Cotton) but snaps at David Platt (Jack P. Shepherd) and Graeme Proctor (Craig Gazey) for spying on them and accuses Liz McDonald (Beverley Callard) of talking down to her. Izzy then bosses Kirk into applying for a job as a machinist at Underworld, making Kirk wonder what he's let himself in for. When Carla Connor (Alison King) turns Kirk down, Izzy demands an explanation; Carla refuses to change her mind but offers Izzy a job as she is impressed by her spirit. Izzy, however, is worried about telling Kirk; however, he reassures her that he never really wanted the job and is happy when Carla offers him a job driving a delivery van.

In June 2010, Tony Gordon (Gray O'Brien) blows up Underworld, killing himself and Robbie Sloan (James Fleet), leaving her and her new colleagues jobless. The same day, her father Owen Armstrong (Ian Puleston-Davies) arrives at The Rovers while she is talking to Gary and she snaps at him for following her. Izzy and the other factory girls start work for Nick Tilsley (Ben Price) but Carla puts a stop to Nick's new business and reclaims her staff while Owen gets the contract to rebuild Underworld, annoying Izzy and Bill Webster (Peter Armitage). In August, Bill accidentally drops cement on her from some scaffolding, causing an argument when Owen tells Bill that he is too old to be a builder as he has just endangered Izzy. However, she tells Owen that the only one who treats her as disabled is him.