AceShowbiz - Amelia Hamlin knows how to make Scott Disick's birthday extra special. To mark her boyfriend's 38th milestone, the daughter of Lisa Rinna and Harry Hamlin presented him with a brand-new Harley Davidson motorcycle.

Showing off the lavish gift was the "Flip It Like Disick" star on his Instagram Story. Sharing a video of him riding the new bike, he raved, "Thanks @ameliagray," adding red balloons and heart emojis.

Amelia, meanwhile, took to her own Story feed to let out a clip of her cozying up to her man as he kissed her cheek. In the accompaniment of the post, the 19-year-old beauty simply noted, "Birthday cutie."

Also attending the aviation-themed birthday bash was Scott's ex, Kourtney Kardashian. The "Keeping Up with the Kardashians" star shared on Instagram Story a video of her with singer Sia Furler from the event.

Kourtney sisters Kim Kardashian and Khloe Kardashian were also at the party. Giving a look at the event, Kim put out footage and a picture showing food trucks, churro maker and a large balloon display that read, "Happy Birthday Lord."

The estranged wife of Kanye West also unveiled a clip showing diamond-covered Rolex watches and jewelry for guests. "I've never heard of this before, party favors like this," she said, before Scott chimed in, "This is how the Lord does it. I'm sorry everybody else gives out candy. I give out ice."

Following the party, Scott spent time with his son Reign and daughter Penelope, whom he shares with Kourtney. In a video shared on Instagram Story, the reality star could be heard telling his son to jump to the swimming pool as her daughter saw it from above.

Scott himself has introduced the two kids and his 11-year-old son Mason to his girlfriend Amelia. Back in February, he and his three children were spotted having a sweet treat at Sugar Factory in Miami along with the model.