Louise Mitchell (also Fowler) is a fictional character from the BBC soap opera EastEnders, who has been played by four different actors since her on-screen birth on 6 November 2001.

Louise's early storylines include Lisa lying about her paternity; her nearly being killed in a road collision caused by Phil's archenemy Steve Owen (Martin Kemp); subsequently becoming caught up in her parents' relationship; and a feud with Ben that involves him physically torturing her.

From her return in 2016, Louise's storylines included her blackmailing Abi Branning (Lorna Fitzgerald) over her fake pregnancy; helping her father cope with the death of his mother Peggy; forming a friendship with Bex Fowler (Jasmine Armfield); being the victim of bullying by Alexandra D'Costa (Sydney Craven) and Madison Drake (Seraphina Beh), in the early midst of which Louise briefly bullied Bex.

In addition, Louise's storylines have also included being kidnapped by a gang that are in dodgy dealings with Ben and Phil, and relationships with fellow student Travis Law-Hughes (Alex James-Phelps); Steve's son Hunter Owen (Charlie Winter); local classmate Keegan Baker (Zack Morris) and Phil's employee Keanu Taylor (Danny Walters), which results in the birth of their daughter Peggy Taylor.

Louise played a pivotal role at Christmas 2019 when she discovered that Keanu had been sleeping with her stepmother Sharon and is the father of her unborn child.

Lisa Shaw (Lucy Benjamin) has a difficult relationship with Phil Mitchell (Steve McFadden) and does not want him to know that he is the father of her baby so she marries Mark Fowler (Todd Carty).

When Ronnie spots Phil arguing, she tells Louise that she could not find her father and calls Social Services, who take her into their care.

Ben claims to find Louise and takes her home, blaming Jordan Johnson (Michael-Joel David Stuart) for locking her up.

[25] After becoming trapped on the top of the bus after a crash, Shakil helps Louise to overcome her fears, telling Bex that he saved her life.

[26] After she is teased over a video of her in the crash, Louise's friends, Alexandra D'Costa (Sydney Craven) and Madison Drake (Seraphina Beh), convince her that Shakil is to blame and encourage her to get revenge.

They plan to sell her off into sex trade in Odessa, and Midge threatens to throw acid in her face if she doesn't sit down and allow her ankles to be bound.

Louise returns to Albert Square with Keanu and Lisa, but while she is catching up with Bex in The Queen Vic, a vengeful Hunter takes the pub full of wedding guests hostage, wounding Ben in a scuffle.

However, when she is driving to tell Phil the truth regarding Sharon and Keanu's affair, Mel gets into a car crash, and dies after being hit by a lorry.

The stress this causes Louise eventually results in her and Lisa deciding to leave the Square in order to live at the villa Mel had purchased in Portugal.

[30] Feeling "overwhelmed" by Louise's birth and needing to discuss her "dilemma", Lisa confides in Phil's girlfriend, Sharon Watts (Letitia Dean).

[33] It was announced in June 2003 that Benjamin would return to the series and she explained, "I didn't think Lisa would give up baby Lou without one last fight.

"[33] Lisa returned in September 2003 for two months and left on 28 November 2003 with Louise, marking the final appearance of Cox in the role.

She believed she was auditioning for a character named Grace, and two days before she started filming, Keeper was told that she would play Louise and her first scene would be with McFadden.

[45] Keeper stated she also "adores" working with Reid and Jamie Borthwick, who play her half-brother Ben and brother figure Jay and hopes for further scenes with Linda Henry as she likes their "funny" pairing and "nice relationship".

[57] Prior to his debut, the Metro reported that Hunter could provide some happiness for Louise, with the pair knowing each other through Lisa and Mel's friendship.

Despite Keegan initially being a "bad boy", he is "smitten" with Louise, who is seemingly "prepared to forget about the past", although Phil would not really approve of a relationship.

The storyline progressed into a revenge porn plot, with Louise, Alexandra D'Costa (Sydney Craven) and Madison Drake (Seraphina Beh) as the catalysts.

[62] Part of the bullying of Louise by Madison and Alexandra includes them turning her against her crush, Travis Law-Hughes (Alex James-Phelps).

Initially, "Louise is on cloud nine having been invited to the prom by her on-off boyfriend Travis" and after finding a "stunning" dress, "she is convinced she is about to have the night of her dreams.

"[69] An "explosive cliffhanger" showing the school being evacuated "as a devastating fire threatened to break out, putting lives in danger", caused by Madison and Alexandra, to settle "scores with their victims.

"[71] Radio Times reporter, David Brown, explained that the storyline "tackles a topic that should be of massive concern to both tech-savvy teenagers and parents who fear they're being left behind when it comes to the way their offspring communicate" and noted that "the fallout of these rash actions" could lead to legal consequences for Louise, Bex and Shakil.

"[74] Keeper says the bullying storyline "has touched audiences" and believes "it’s really important that EastEnders are showing the friend on the sidelines watching it.

[79] Jon Sen, the show's executive producer, praised Keeper – the "incredible asset" to the cast – for her work and commented, "Her portrayal of Louise Mitchell over the past years has been a joy to watch.

[82][83] She was nominated in the 2016 TV Times Awards for Most Popular Newcomer[84] but lost out to Emmerdale's Isobel Steele, who plays Liv Flaherty.

[85] She was also shortlisted for Best Newcomer at the 2017 National Television Awards,[86] but lost out to Faye Brookes, who portrays Kate Connor in Coronation Street.