Sydney Sweeney's Bold Birthday Celebration: Cakes, Lingerie, and All

Sydney Sweeney left very little to the imagination in her new Syrn birthday campaign.

Sweeney, 28, showed off her curves in a number of sizzling hot looks via Instagram on Thursday, August 26, promoting her latest collection ahead of her 29th birthday in September.

First, she swung open a fridge door while wearing a sheer floral bra and matching G-string adorned with pastel blue florals. She completed her look with coordinating garters and thigh-high stockings. Sweeney grabbed a bowl of eggs and turned around, giving the camera a look at her bum.