Kylie Jenner is “incredibly happy” with Timothée Chalamet (source)

Kylie Jenner celebrated her birthday with a luxury trip to the Bahamas – and her boyfriend was by her side!

The mother of two celebrated her 27th birthday on August 10, and a source told PEOPLE that her boyfriend Timothée Chalamet was in attendance at her “birthday party in the Bahamas” along with a “small group of close friends.”

“It’s been a nice break for her. She’s incredibly happy with him. She’s never been so in love,” the source says of her and the 28-year-old actor, who have been dating since April 2023. “He’s great for her.”

“Her family loves him,” the source continues of Chalamet. “He is so discreet and always there for her. He is a true gentleman and everything Kylie deserves.”

“They are very serious,” the source adds.

A few days later, Kylie shared some photos from the tropical trip on Instagram and wrote in the caption: “Best birthday ever??”

One of the photos shows a beautiful dining table on the boat decorated for her birthday – with balloons spelling out her name – and another photo shows her and her best friend Stassie Karanikolaou playing poker while drinking red wine on the boat.

Her post also included a sweet photo from her celebration at home with her two-year-old son, Aire, who had frosting on his nose as he leaned close to her birthday cake.

Kylie received a flood of love on social media on her birthday when her sister Kendall Jenner made a joke that referenced a joke by The Kardashiansand wrote in her Instagram stories: “Guess who is basically 30 now?”

Kourtney Kardashian called her sister “my little goose” in a post on her Stories along with an old family photo, and Kim Kardashian posted a lengthy tribute to Kylie, “thanking the universe for blessing[her]with such a sweet sister like you.”

Khloé Kardashian wrote: “Anyone who is lucky enough to be around Kylie knows what a beautiful and special soul” she is, while the sisters’ mother Kris Jenner praised Kylie for being “the most incredible mommy” to her two children.

Since Kylie and Chalamet were first linked in early 2023, they have largely kept their relationship under the radar – aside from a few high-profile appearances at the 2024 US Open and Golden Globes – where they were seen sharing a cheeky kiss during a commercial break.

In July, a source told PEOPLE that Kylie “wants to protect the relationship, but whenever she talks about him she has a big smile on her face.”

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Since they are both busy, the stars “make time to see each other, especially on the weekends,” the source said.

“He’s been working in NYC. She’s been visiting him and he’s been back in LA for a few weekends. They’re making it work.”