The reality TV star wore the sexy gown as she accompanied Chalamet to receive the Arlington Artist of the Year Award for his role playing Bob Dylan in 'A Complete Unknown'

Kylie Jenner unexpectedly joined boyfriend Timothée Chalamet at the Santa Barbara Film Festival.

This particular shade of lime green seems to be a favorite of the actor’s, who stepped out with girlfriend Kylie Jenner to receive the Arlington Artist Of The Year Award.

As has become tradition, Chalamet met up with his girlfriend inside the festival after posing solo on the red carpet. Jenner, for her part, dressed up in a plunging black dress with a cut-out backside from Alaïa. Two blinding diamond rings completed her look. The model shared photos from the evening (sans Chalamet) the following morning.

Kylie Jenner is one gorgeous businesswoman! The reality star made a quick trip to Georgia to celebrate the launch of Sprinter Vodka Soda’s first-ever single-flavor pack — Peach — and, of course, she did it in style.

The reality star went all out with her accessories while cheering for Chalamet at the Feb. 11 event Kylie Jenner went all out with her bling while cheering on boyfriend Timothée Chalamet at the Santa Barbara International Film Festival.