Happy Birthday, Tyga!

The rapper turned 27 on Saturday and in honor of his special day, his girlfriend, Kylie Jenner, took to Instagram to share two very intimate (and NSFW!) pics.

WATCH: Kylie Jenner Babysits Tyga and Blac Chyna's Son King as Family Celebrates Birth of Baby Dream

In the first photo, the 19-year-old reality star appears topless, wearing only a pair of unbuttoned distressed jeans and nude pointy toe stilettos, as she straddles her beau. The rapper rests his head on her chest, with his right hand grabbing ahold of her voluptuous booty.

"Happy birthday baby," she captioned it, accompanied with a red lip emoji.

The second photo, which was shot in black-and-white, was equally racy, but far less serious, as the adorable duo hugged each other while laughing. "Irreplaceable," Kylie wrote.

The lip kit maven also took to Snapchat, sharing a photo of herself using a custom "Happy Birthday Tyga" filter, which featured a cartoon version of the pair.

Dressed in a blue-and-red flannel and New York Mets baseball cap, the birthday babe followed suit, also sharing a few selfies on his own Snapchat story.

And it appears Tyga was feeling quite nostalgic on Saturday. "Back then it was all a dream," he captioned a throwback pic of himself rapping. "Thank you for your love and support #27."

WATCH: Kylie Jenner and King Cairo Throw Tyga a Sweet Surprise Birthday Bash

On Thursday, Tyga was in for a treat when Kylie and his 4-year-old son, King Cairo, whom he shares with ex Blac Chyna, threw him a surprise birthday bash, complete with balloons, several cakes and delicious bites.

In typical fashion, Kylie documented their fun fête via social media. See highlights in the video below!