Before-and-after photos reveal incredible transformation of Kris Jenner's late sister Karen Houghton after she underwent five-hour facelift to mirror herself on the Kardashian matriarch

Kris Jenner's late sister Karen Houghton had a complicated relationship with the famous momager, but during one of their times of peace she underwent a dramatic transformation to look like her high-profile sibling by getting an extensive facelift.

The Kardashians star Kris shared on Tuesday that her younger sister had died 'unexpectedly' the day before aged 65, with officials attributing her death to natural causes, but exact circumstances remain unclear.

Karen, who famously had a rollercoaster relationship with the 68-year-old Kardashian-Jenner matriarch, was reported deceased to San Diego County officials on Monday in San Marcos, California, according to TMZ.

Having a famous sibling isn't always easy, but in 2016, Karen paid the reality TV star the ultimate compliment by undergoing a facelift to 'look like my beautiful sister Kris.'

Kris Jenner's late sister Karen Houghton underwent a dramatic transformation to look like her high-profile sibling in 2016. Pictured left is Karen before and right is after

After revealing the transformation three weeks after the surgery Karen (left) told Inside Edition: 'I look like my beautiful sister and I never thought I would.' Pictured right is Kris in 2016

During a special segment on Inside Edition, Karen allowed TV cameras to document the grueling five-hour procedure.

At the time, the Kardashians' self-proclaimed 'crazy aunt' explained on camera that she wasn't happy with certain aspects of her appearance. 

'Certain angles of my face were just not what I wanted. No one wants a double chin,' she said.

Karen's plastic surgeon Dr. Ben Talei transformed her face with an AuraLyft - apparently the most extensive facelift a woman could get at the time.

She admitted that while she felt some pressure to 'keep up with the Kardashians,' she was mainly having the nip-tuck for herself.

She added: 'Of course the Kardashians – everyone wants to look beautiful.'

Under just local anesthetic, and able to talk to the doctor throughout, Karen's operation lasted five hours.

Dr. Talei lifted Karen's face and neck, and also removed fat from under her eyes and transferred it to her cheeks to make her cheekbones more pronounced.

The exact circumstances of her passing are unclear, with county officials attributing her death to natural causes for now

Kris reunited with Karen after a period of estrangement in 2019 - with their meet documented in an Instagram Story posted by Karen's daughter Natalie Zettel - [L-R] Natalie, Karen, Mary Jo Campbell, Kris and Kylie Jenner

In May 2023, Karen's daughter Natalie posted a loving tribute for Mother's Day posing with Karen and grandma MJ

After revealing the transformation three weeks after the surgery Karen told Inside Edition: 'I look like my beautiful sister, Kris, and I never thought I would.' 

She added that she was pleased with the 'incredible' results. 

In 2013, Karen claimed her famous sister spent $1 million on plastic surgery stemming from being self-conscious about her weight when she was younger. 

'She was heavy as a kid and became worried about her looks at age 15,' Karen told In Touch magazine at the time. 

She added: 'The whole world knows it – Kris is vain.'

However, the mother-of-six has always been open about getting cosmetic surgery, admitting to both a breast augmentation and facelift.

The TV star had her face done in 2011 and had a second boob job in 2012. 

Kris and Karen have long endured a rollercoaster relationship, oscillating between taking public barbs at one another, to Kris lavishing her little sister with pricey gifts.

Part-time nurse Karen had become known as the black sheep of the family after she candidly opened up outside Kim Kardashian's baby shower in 2013 and even did a jig for waiting reporters.

Despite signing an NDA for the event, Karen waxed lyrical about eating 'marshmallow on a stick', the rose cake at the event and the goody bag, saying Kim and Kanye West 'gave out Rolexes.'

In an interview with DailyMail.com in 2014, Karen explained that she wouldn't be attending Kim and Kanye's wedding that year and revealed: 'I'm not materialistic, I'm more into animals and charities.'

She has frequently been outspoken when her sister Kris has riled her up. 

Karen called Kris vain in 2013 for having '$1 million of surgery.' The KUWTK has been open about having a facelift (pictured in 2011) and two breast augmentations

In April 2014, Karen wrote on her Facebook page: 'Pray for Kris Jenner she needs it…crazy. Shes (sic) as nutcase.

'She doesn't need prayers she needs sky vodka hahaha hahaha hahaha.'

And explaining her somewhat harsh views, Karen said: 'I get p***ed off at her because she doesn't respond to me. 

'If you think your sister would call you back, she doesn't. And it hurts me.'

However the part-time nurse did poke fun at herself too, in a May 2014 Facebook post, writing, 'Be someone s crazy aunt...its fabulous! !! K (sic)'

Karen blamed her sibling's celebrity status and hunger for fame and fortune. 

She said: 'I don't care how much money you have or who you are, you're my sister. I'm not afraid of her. I can't get to her anymore. But I guess it's the money.

'She's a huge celebrity and now she has changed. I'm not saying good or bad. But I've seen what it can do to Kris… ever since she moved to L.A.'

Admitting she has had run-ins with Kris - mainly to do with caring for their aging mother, Karen previously told MailOnline: 'I called up Kris yelling at her, because I was like, "You need to help your mom more and you know it." And I think that she kind of got the message. I was screaming - I don't even care.'

In 2014, the former air stewardess told Radar, 'when you express a loving family and family values and a close family and my mom wants to live in La Jolla, buy her a condo, Kris! I don't understand her. I never will. It's just her personality.'

The attack followed a 2013 interview during which Kris told Radar: 'Unfortunately, my sister has been dealing with demons for years.'

In 2019, the pair were revealed to have reunited in an Instagram Story posted by Karen's daughter Natalie.

The feuding sisters posed smiling with Natalie; her famous cousin, Kylie Jenner; and their mother, Mary Jo 'MJ' Campbell.

Kris, born Kristen Mary Houghton, was raised in San Diego with Karen, her only sibling.

Their single mother MJ looked after them when their parents divorced. Kris was just seven.

In the star's 2011 autobiography she said of her sister, 'We loved each other, and we were there for each other through thick and thin, and to this day we are a part of each other's lives.'