Amelia Hamlin, 19, puts on a busty display in sheer white lingerie amid romance with Scott Disick

Things are reportedly getting ‘pretty serious’ with boyfriend Scott Disick, who is 18 years her senior.

And Amelia Hamlin looked sensational as she posed in a white bra and knickers while headlining a lingerie campaign for Boux Avenue on Monday.

The actor, 19, set pulses racing as she posed with her hands up to her head for the sultry shot, wearing nothing but the sheer underwear set.

Stunning: Amelia Hamlin, 19, looked older than her years as she posed in a white bra and knickers while headlining a lingerie campaign for Boux Avenue on Monday

She looked stunning as she knelt on the couch for the picture, wearing natural make-up and swished her long brunette locks in another snap.

The reality star, who has been an longtime advocate for eating disorder awareness, spoke about body positivity for the brand’s ‘I Am Who I Am’ campaign on International Women’s Day.  

Amelia, who has been in recovery for an eating disorder for the past couple years, shared her story on being in the spotlight and feeling unhappy in her body until now. 

Racy: The actor set pulses racing as she swished her long brunette locks  and posed with her hands up to her head for the sultry shot, wearing nothing but the sheer underwear set

Racy: The actor set pulses racing as she swished her long brunette locks  and posed with her hands up to her head for the sultry shot, wearing nothing but the sheer underwear set

Confident: In a video for the brand's 'I Am Who I Am' campaign, she said: 'The most important quality any woman can have is just self-love, self-respect, self-confidence and body positivity'

Confident: In a video for the brand’s ‘I Am Who I Am’ campaign, she said: ‘The most important quality any woman can have is just self-love, self-respect, self-confidence and body positivity’

In an accompanying video, the model said: ‘The most important quality any woman can have is just self-love, self-respect, self-confidence and body positivity.’ 

Last year, the teen opened about her struggles with anorexia and how she ended up getting treatment on an episode of Dear Media podcast The Skinny Confidential Him and Her.

The daughter of Lisa Rinna, 57, and Harry Hamlin, 69, said her eating disorder started after seeing paparazzi photos of herself when she was about 14 or 15. 

Hard to handle: Last year, the teen opened about her struggles with anorexia and how she ended up getting treatment

Recovery: Amelia said she gained 50 pounds in six months at the start of her recovery. She later learned she has Hashimoto's disease. She is pictured in 2018

Hard to handle: Last year, the teen opened about her struggles with anorexia and how she ended up getting treatment (pictured left in 2017 while battling her eating disorder and right in 2018)

Wake up call: Amelia's family eventually took her for treatment at UCLA and is now two years into her recovery (pictured in 2017)

Wake up call: Amelia’s family eventually took her for treatment at UCLA and is now two years into her recovery (pictured in 2017)

She said was going through an ‘awkward stage’ and was upset by her appearance in the pictures and started doing the Master Cleanse lemonade diet. 

Amelia also began obsessively working out, but would deny anything was wrong to her mother and older sister, Delilah Belle Hamlin, 22.

Her family eventually took her for treatment at UCLA, where she was told she was ‘going to be dead’ if she didn’t get help and is now two years into her recovery.

She has more recently made headlines with her relationship with Kourtney Kardashian’s ex, Scott Disick, and the pair confirmed their romance on Instagram last month.

A dream! Amelia gushed over Scott Disick, 37, on her Instagram Stories after it was revealed her parents struggled with the idea of their 'little girl' dating a father-of-three

A dream! Amelia gushed over Scott Disick, 37, on her Instagram Stories after it was revealed her parents struggled with the idea of their ‘little girl’ dating a father-of-three

Amelia, 19, and Scott, 37, were first romantically linked after they were spotted arriving to Kendall Jenner’s Halloween party together in October.

It has been claimed that her parents were ‘sceptical’ about her relationship with the father-of-three as the pair have an 18-year age gap. 

According to US Weekly, a source said: ‘Her parents were sceptical at first. But seeing their daughter happy makes them feel better about their relationship.’ 

Real Housewives of Beverly Hills star Lisa and head of the Kardashian clan Kris Jenner are friends, and that is how the pair met.

Protective: Her parents Lisa Rinna, 57, and Harry Hamlin, 69, were reportedly 'sceptical' about her relationship with Scott as the pair have an 18-year age gap (family pictured in 2017)

Protective: Her parents Lisa Rinna, 57, and Harry Hamlin, 69, were reportedly ‘sceptical’ about her relationship with Scott as the pair have an 18-year age gap (family pictured in 2017) 

MailOnline has contacted Harry and Lisa’s reps for comment.  

Scott co-parents sons Mason, 11, and Reign, six, and eight-year-old daughter Penelope with ex Kourtney Kardashian who he dated from 2006 until 2015. 

They met each other at the home of Girls Gone Wild founder Joe Francis and their ups and downs were filmed for Keeping Up With The Kardashians. 

He split from Lionel Richie’s daughter Sofia Richie, 22, back in August who he dated for three years. They had a 16-year age gap. 

Smitten: Amelia and Scott were first romantically linked after they were spotted arriving to Kendall Jenner's Halloween party together in October (pictured recently)

Smitten: Amelia and Scott were first romantically linked after they were spotted arriving to Kendall Jenner’s Halloween party together in October (pictured recently)

And Amelia and Scott have continued to solidify their relationship with more sizzling Instagram content.

Ahead of Valentine’s Day last month, he posted a photo with Amelia for the first time as they cozied up at dinner.

While in Florida the pair were also seen what looked to be house hunting as they checked out a waterfront home, making it the second time they’ve been seen touring property together after looking at a Holmby Hills mansion a few months back.

Amelia left no room for confusion on her feelings for Scott when she shared some cuddly snaps of them at dinner at Carbone.   

In one snap he had his arm around her waist as she appeared braless while looking at her man and in another she wrote: ‘My dream man.’  

Scott has been linked to a string of models since calling it quits with Sofia Richie over the summer, but Amelia has consistently been on his arm since October. 

Stunning: Although Amelia's parents were 'sceptical' at first, a source said that 'seeing their daughter happy makes them feel better about their relationship'

Stunning: Although Amelia’s parents were ‘sceptical’ at first, a source said that ‘seeing their daughter happy makes them feel better about their relationship’