Sydney Sweeney goes TOPLESS and sucks on her thumb in her raunchiest lingerie commercial ever, see 2 videos and 15 crazy Sweeney photos here…

Sydney Sweeney has stripped down for her raunchiest Syrn campaign to date.

The Euphoria actress, 28, leaves almost nothing to the imagination in the latest commercial for her budding lingerie brand.

In the jaw-dropping ad, a lingerie-clad Sweeney bakes up a storm in the kitchen before going completely topless, holding nothing more than two small cakes to cover her chest with.

In the next scene, Sweeney changes into a black lingerie set, complete with a garter belt and stockings, and then crawls across a dining table on all fours towards a large birthday cake.

She then tastes some of the frosting, suggestively licking it off of her finger and thumb, before gazing seductively into the camera.

The commercial features a number of wild shots, including close-ups of Sweeney’s cleavage and her backside in a variety of G-strings.

The Housemaid star, who turns 29 on September 12, said that the racy campaign for her latest Syrn collection was specifically themed around her upcoming birthday.

‘Celebrate my birthday month with my newest Syrn collection. Coming September 1st,’ she teased.

The wild advert drew a mixed reception in the comments, with one fan asking if Sweeney was teasing a potential OnlyFans launch.

‘I’ve seen more of Sydney than some women I’ve dated,’ added another.

A third commented, ‘Where can I buy the cake? Asking for a friend.’

Sweeney launched her lingerie brand earlier this year, telling Cosmopolitan in January: ‘I want to show women that we can take back our power and fully free ourselves.’

Despite fitting a certain blonde bombshell archetype, Sweeney insists that Syrn is a diverse, female-first brand.

She said: ‘My designers are all women, and I have an amazing diverse team. My models are a beautiful range of body types.’

The brand, which has been in development since mid-2024, sold out immediately following its January launch.

Sweeney previously shared that she stays in shape by taking classes at the boutique fitness studio Solidcore, which is described as a ‘high-intensity, low-impact full-body workout on a Pilates-inspired reformer.’

The actress takes Solidcore classes several times per week, telling Women’s Health magazine that it makes her feel ‘toned and strong.’