Happy birthday! Caitlyn Jenner celebrates with an early family lunch, without Kendall and Khloe

It's Caitlyn Jenner's birthday today and the reality TV started her celebrations yesterday.

The *I Am Cait *star went for an early lunch to celebrate turning 66 at The Villa in Woodland Hills, California.

She was joined by her children Kim Kardashian, Kylie Jenner, Kourtney Kardashian and her daughter Penelope Disick.

Kendall Jenner, Khloe Kardashian and Rob Kardashian were not spotted at the get-together. And although Khloe has been on Instagram to say she's been back in training with her personal trainer, there was no mention of birthday wishes to her parent.

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Caitlyn's youngest child Kylie shared an image of the pair, captioned: "Early birthday lunch with @caitlynjenner Happy birthday dad what an amazing year for you."

"Kourtney, Kim and Penelope arrived together and Kylie arrived on her own," an eyewitness told ET.

And apparently everyone who attended the hour and a half long luncheon "seemed very upbeat and ready to have a birthday lunch a day early."

There were also two black boxes brought inside the restaurant, maybe gifts?

Happy birthday Cait!