Amelia Hamlin cuddles up to beau Scott Disick at her 20th birthday dinner

Amelia Hamlin cuddled up to her much older boyfriend Scott Disick as she celebrated her 20th birthday on Saturday night.

The showbiz legacy posted an Insta Story that showed the 38-year-old reality star placing a hand on her thighs as she grasped his forearm.

Her Insta Stories that evening showed off a lavish celebration where her friends could be seen holding up sparklers.

Special night: Amelia Hamlin cuddled up to her much older boyfriend Scott Disick as she celebrated her 20th birthday on Saturday night

Side by side; The showbiz legacy posted an Insta Story that showed the 38-year-old reality star placing a hand on her thigh as she grasped his forearm

In a festive touch the sparklers were attached to neon-lit bottles and Amelia was so overcome she captioned the video: ‘STOP.’

Amelia, who is technically turning 20 on Sunday but evidently partying until midnight, was treated to a sumptuous celebration.

One of the waiters at her party venue of choice could be spotted on her Insta Stories holding up a marquee reading: ‘HAPPY BDAY AMELIA.’

The daughter of Lisa Rinna and Harry Hamlin also used her Insta Stories to show off a pillar at the party that was decorated with tinsel and pictures of her.

Having a ball: Her Insta Stories that evening showed off a lavish celebration where her friends could be seen holding up sparklers

What an evening: In a festive touch the sparklers were attached to neon-lit bottles and Amelia was so overcome she captioned the video: ‘STOP’

What a night: Amelia, who was technically turning 20 on Sunday but evidently partying until midnight, was treated to a sumptuous celebration

Some of the photos of Amelia that were pasted onto the pillar were modeling shots that had previously appeared on Instagram.

One of the snaps was infamously posted by Scott and showed her in a bra and a nude thong as she reached up to a bookshelf.

Before her party got going Amelia shared some selfie footage apparently taken at home when she was ready to go out.

Idiosyncratic decor: The daughter of Lisa Rinna and Harry Hamlin also used her Insta Stories to show off a pillar at the party that was decorated with tinsel and pictures of her 

 Origin: Some of the photos of Amelia that were pasted onto the pillar were modeling shots that had previously appeared on Instagram

There it is: One of the snaps was infamously posted by Scott and showed her in a bra and a nude thong as she reached up to a bookshelf

Amelia modeled a shimmering gold crop top with a matching miniskirt and filmed herself in the mirror in her evening wear.

She wore her hair in a voluminous throwback do reminiscent of the 1970s and wrote above the video that it was her ‘BURFDAY.’

Scott, who has three children, began dating Amelia when she was 19 and also first got involved with his previous girlfriend Sofia Richie when she was 19.

Adjusting her hair: Before her party got going Amelia shared some selfie footage apparently taken at home when she was ready to go out

Full length: Amelia modeled a shimmering gold crop top with a matching miniskirt and filmed herself in the mirror in her eveningwear

Preparing: She wore her hair in a voluminous throwback do reminiscent of the 1970s and wrote above the video that it was her ‘BURFDAY’

History: Scott, who has three children, began dating Amelia when she was 19 and also first got involved with his previous girlfriend Sofia Richie when she was 19

He shares his children – Mason, 11, Penelope, eight, and Reign, six – with his amicable ex Kourtney Kardashian whom he had an on-off romance with until 2015.

During this week’s series finale of Keeping Up With The Kardashians he said he is ‘coming to terms’ with the idea that he and Kourtney may never get back together. 

‘The fact that we have what we have is amazing, and I am grateful for that,’ he said, pointing out: ‘Our kids are happy.’ 

Side by side: Scott, who has three children, began dating Amelia when she was 19 and also first got involved with his previous girlfriend Sofia Richie when she was 19