Jason is the son of Eileen Grimshaw (Sue Cleaver) and Tony Stewart (Alan Igbon; Terence Maynard), but he did not know his father for many years, his younger brother is Todd (originally Bruno Langley, now played by Gareth Pierce).

Jason's storylines have mostly revolved around his failed relationships with various women including, Sarah Platt (Tina O'Brien), Candice Stowe (Nikki Sanderson), Violet Wilson (Jenny Platt), Becky McDonald (Katherine Kelly), Rosie Webster (Helen Flanagan), Stella Price (Michelle Collins), Maria Connor (Samia Ghadie) and Eva Price (Catherine Tyldesley).

Ryan Thomas and Bruno Langley were cast in the roles of brothers Jason and Todd Grimshaw, the 17- and 15-year-old sons of Streetcars controller Eileen.

Producers hoped Thomas and Langley would achieve the same heartthrob status as Adam Rickitt, who played Nick Tilsley for two years before leaving to pursue a pop career.

He is a man who can be your best friend or your worst enemy, and with a long history of lies and betrayal, this is a guy who has an awful lot of making up to do.

"[6] In late 2005, Jason began dating Sarah Platt portrayed by Tina O'Brien, they had an on off relationship and were due to marry in 2006.

"[11] In 2012, Jason began a relationship with ex-girlfriend Maria Connor played by Samia Ghadie, Thomas praised the plot: "She was one of the first girls he ever went out with.

[14] It was revealed that Stella would be livid that her daughter is dating her ex, but eventually calms down as she already has enough to worry about as her killer partner Karl Munro (John Michie) has left the street in dramatic circumstances.

He finds a traumatised Toyah Battersby (Georgia Taylor) lying in the ginnel, following her rape in April 2001, whilst out jogging early one morning.

However, on Christmas Day 2006, Jason has a major surprise delivered to the front door in the shape of a baby – supposedly his little girl by a young woman called Emma (Stephanie Waring).

Out of revenge for his family disowning him, David loosens the bolts on the scaffolding at the builder's yard on 22 October 2007, a week before Jason and Sarah's wedding.

Jason backs out when Sarah admits that she planted drugs in David's drawer at the salon, thereby ruining his chances of Stephen offering him the job in Italy.

On New Year's Eve 2007, Jason and Becky Granger (Katherine Kelly) kiss as the midnight bells chimes, and on 1 February 2008, they have sex.

Unfortunately, Steve McDonald (Simon Gregson) also proposes to Becky and although she initially decides to marry Jason, she realises she can not go through with it and calls off the engagement.

However, following Joe's sudden death, Tina struggles with her grief and ends her engagement to Jason and he moves out of the flat, though he reclaims it.

David then cut the hoods off Graeme's hoodies and the peaks off his caps and Jason throws binbags of Tina's clothes on top of her from the house's windows, all in front of a crowd.

On 24 September 2010, Jason is recruited by a half-naked Rosie Webster to drive her in Kevin's car to Sheffield to pick up Sophie (Brooke Vincent) and her girlfriend Sian (Sacha Parkinson) after they ran away together.

Immediately, there is chemistry between the pair; on 18 October, Rosie books Owen to come round and redecorate the kitchen after the oven catches fire whilst Sally and Kevin are away.

When the Joinery bar exploded, bringing a tram off the viaduct which smashes into the Corner Shop and The Kabin, Jason helps to rescue people who are trapped, including going into No.13 (which is in flames) to find Simon Barlow (Alex Bain).

When Graeme convinces Claire to run away after she admits to the police that she attacked Tracy Barlow, Jason helps her and her sons escape and drives her to the airport, on 14 January.

On 17 January, Eileen's money troubles get a lot worse, and number 11 starts crumbling around her; she seeks help from an insurance firm but when Jason spots a man lurking at the back of the house, he thinks he is trying to spy on Rosie and punches him, only to discover that he is the insurance inspector, which of course, affects the result and Eileen can not claim a penny.

When Kevin is almost crushed to death at the garage when his new car ramp malfunctions, Jason joins Rosie and her family at the hospital.

However, she orders a stripper and the party turns to all-out mayhem when Chris Gray (Will Thorp) has a go at Frank Foster (Andrew Lancel).

Jason rekindles his relationship with Maria Connor (Samia Ghadie) however she later shares a kiss with her gay best friend Marcus Dent (Charlie Condou), who is actually dating Aiden.

Impressed by his concern for her mother Stella, Eva Price (Catherine Tyldesley) shares a kiss with Jason in September 2013, and they later begin a serious relationship.

Tony, still not convinced that he is a good enough father, decides to purchase the builder's yard from Owen Armstrong (Ian Puleston-Davies), who is desperately trying to pay off his £80,000 debt.

He also buys the flat next door, which he rents to Andy Carver (Oliver Farnworth) and Steph Britton (Tisha Merry).

They later employ Jason's friend, Gary Windass (Mikey North) and Zeedan Nazir (Qasim Akhtar), as labourers.

His van is soon torched and he believes it is retaliation from one of Callum's friends, but it is actually his mother's partner Pat Phelan (Connor McIntyre) who is pretending that it's them to scare him and take his business.

Before going, he goes to say goodbye to Sarah in a mental hospital where she has been committed because of being paranoid over Callum (unbeknown to Jason, she witnessed his murder at the hands of her sister-in-law, Kylie) and being diagnosed with postpartum psychosis.