The star's plunging sheer naked gown featured a high slit and sweeping train, which cascaded behind her as she walked the red carpet.
She paired the barely-there dress with strappy gold heels, small silver earrings and a collection of rings. She styled her signature bob with a sweeping side part and loose beachy waves.
Jenna showed off the intricate (and dazzling) bead work on her dress in a glitzy video shared on Instagram, made using the Kira Kira app all the celebrities are obsessed with.
"Literally waited all year for the right dress to use Kira Kira with," Jenna wrote in the caption. "Thank you @amas, thank you."
See all of the night’s best red carpet looks in our gallery here.