Kelly Windsor (also Glover) is a fictional character from the British ITV soap opera Emmerdale, played by Adele Silva. The character first appeared on 10 August 1993. Silva portrayed her from August 1993 until November 2000. In February 2005, it was announced that Silva would be reprising her role and she returned in June 2005. Silva left the soap once again in October 2007, and in November 2010, it was announced that Silva would be returning to Emmerdale in February 2011. Silva reprised the role for a period of three months and left again in May 2011.

Kelly is the daughter of Vic (Alun Lewis) and Anne Windsor. Kelly, for a long time, didn't know that Anne had died after catching Vic in bed with Viv Hope (Deena Payne) . Horrified, she ran outside and was hit by a car as she was too upset to look where she was going. As Kelly did not know this, she loves Viv like a mother. Kelly gained a stepbrother, Scott Windsor (Toby Cockerell), Viv's son from her first marriage, and a half-sister, Donna (Sophie Jeffery), from Vic and Viv's marriage.

Kelly moves in the village with her father Vic, mother Viv, stepbrother Scott and half-sister, Donna.

Kelly's first boyfriend is local teenager, Roy Glover (Nicky Evans). They date briefly but soon split up. Kelly's next relationship is with her teacher, Tom Bainbridge (Jeremy Turner-Welch). When their affair is exposed, Kelly denies it but no one believes them and Tom loses his job. The couple decide to run away together but Kelly returns a few months later, telling Viv that she left Tom after finding him in bed with another pupil.

Having been betrayed, she stops trusting men and behaves promiscuously. She toys with Roy's affections, has a one-night stand with Biff Fowler (Stuart Wade) and a brief fling with Will Cairns (Paul Fox). Discovering she is pregnant by Biff, Kelly tells Chris Tate (Peter Amory) that he is the father, hoping he would pay for an abortion. Due to the side-effects of his disability, he is scared about the possibility of not being able to have children and asks Kelly to keep the baby. Kelly secretly plans an abortion but miscarries after a fight with Kim Tate (Claire King) leads her to fall down a flight of stairs. She threatens to press charges but eventually accepts £1,000 from Steve Marchant (Paul Opacic) as compensation.

Kelly realises that she has romantic feelings for her stepbrother Scott. After sleeping together, Kelly returns to Roy and they get engaged. Whilst planning their wedding, Kelly continues to see Scott but refuses to leave Roy so Scott exposes their affair but Kelly denies it. After they get married, Kelly and Roy have financial problems and become cleaners. When Kelly "borrows" jewellery from a client, Miss Curtis, and stages a dinner party at her house, the police are called. Wanting to protect Kelly, Roy accepts responsibility and is imprisoned. Whilst he is away, Kelly sleeps with Scott again after meeting him at a hotel and they admit their love for each other, sending Kelly into a deep depression. After writing letters to her family and admitting to the affair on tape, Kelly attempts suicide. She is saved but loses the baby she was carrying, unsure if the father was Scott or Roy. Scott burns the letters but Kelly confesses to Roy and decides to start a new life in London, bankrolled by Chris Tate. Although she and Roy have a brief reconciliation, they are unable to make their marriage work and he leaves for Ibiza without her. Feeling rejected again, Kelly tries seducing Viv's new fiancé, Bob Hope (Tony Audenshaw), but he tells Viv and this leads to a vicious fight between Viv and Kelly, also revealing Scott and Kelly's affair. With no friends or family willing to talk to her, Kelly leaves for London, with Donna and Scott seeing her off.

Kelly returns five years later and it is clear that she has not changed. Throwing herself back into village life, she makes enemies of Zoe Tate (Leah Bracknell) and Dawn Woods (Julia Mallam) – both ex-girlfriends of Scott. She causes trouble for Dawn when she flirts with Scott, gets him drunk and drags him into her bed, secretly phoning Dawn and she hears them talking. Donna catches them in bed together the next day and Kelly implies that they have slept together but admits they didn't when Donna threatens to tell Viv. When Dawn finds out that Kelly lied, she tracks her down and they fight outside the Woolpack, ending with Kelly being soaked by a hosepipe.

Bored of working in the cafe, Kelly targets the rich men in the village and seduces curate, Ethan Blake, but they are caught by Laurel Thomas (Charlotte Bellamy) in the church. She then seduces Jimmy King (Nick Miles) and they have a brief fling but he ends their relationship when his ex-wife Sadie (Patsy Kensit), reveals Kelly's career as a glamour model. Kelly moves on to Rodney Blackstock (Patrick Mower) despite a thirty-one year age gap. Kelly develops feelings for Rodney and is delighted when he buys Holdgate Farm for her and his son, Paul Lambert (Mathew Bose), planning to turn it into a spa but Rodney runs out of money and the spa is abandoned. Despite promising to stand by Rodney, she turns her attentions back to Scott. When caught by Rodney and Scott's current girlfriend, Debbie Dingle (Charley Webb), they split up. Kelly spends months feeling sorry for herself and takes her frustration out on her family.