Bella Thorne sizzles in a strapless black mini-dress as she packs on the PDA with fiancé Mark Emms at amfAR gala during the Venice Film Festival

Bella Thorne put on a sweetheart show, sharing a kiss with fiancé Mark Emms at the amfAR gala during the Venice Film Festival on Sunday.

The Game Of Love actress, 25, stunned in a strapless black mini dress complete with sheer panels that give a glimpse of her gorgeous figure underneath.

Bella’s gown also featured a ruffled bodice, and she completed the chic look with black heels and a thin choker.

Meanwhile, entrepreneur Mark made a friendly figure in a tuxedo worn with a crisp white and dark tie.

Unable to keep their hands off each other, the duo picked up the PDA as they headed to the star-studded red carpet.

Puckering: Bella Thorne put on a much-loved showing and shared a kiss with fiancé Mark Emms at the amfAR gala during the Venice Film Festival on Sunday

Busty: The Game Of Love actress, 25, stunned in a strapless black mini dress complete with sheer panels teasing glimpses of her gorgeous figure underneath

Busty: The Game Of Love actress, 25, stunned in a strapless black mini dress complete with sheer panels teasing glimpses of her gorgeous figure underneath

amfAR, the Foundation for AIDS Research, is one of the world’s leading non-profit organizations dedicated to supporting AIDS research, HIV prevention, treatment education and advocacy.

Since 1985, amfAR has invested more than $635 million in its programs and awarded more than 3,500 grants to research teams around the world.

It comes after Bella shared a slew of adorable snaps and clips to her Instagram stories last month as the couple celebrated their one-year anniversary.

She also included a photo of Mark smiling next to a large bouquet of red roses and an assortment of balloons.

The star added a caption at the top of the photo that read, “Celebrating a year!!”

The pair first met last year while attending Cara Delevingne’s birthday party in Ibiza and began dating in August 2022.

Thorne also uploaded a short clip of them cozying up together and showing a little affection while standing close together in a spacious bedroom.

Emms gently placed his hands on Bella’s arms as he stood behind the beauty and she kept a cheery smile on her face as she struck a pose for the camera at the same time.

Pose: Bella's frock also featured a ruffled bodice and she completed the chic look with black heels and a thin choker

Pose: Bella’s frock also featured a ruffled bodice and she completed the chic look with black heels and a thin choker

Hot stuff: The dress was perfectly tailored and fit like a glove

Glam: She posed in front of a storm and took in the breathtaking view

Hot stuff: The dress was perfectly tailored and fit like a glove

Kiss: The duo couldn't keep their hands off each other and grabbed the PDA as they headed to the star-studded red carpet

Kiss: The duo couldn’t keep their hands off each other and grabbed the PDA as they headed to the star-studded red carpet

The former Disney Channel star showed off her summer style with jeans and a fitted black corset top.

She paired the ensemble with a semi-sheer, black covering that fell to her ankles and tied at the front with a string.

Thorne pulled on a pair of black open-toed heels to match the color scheme of her ensemble.

Her red-orange locks were parted in the middle and flowed effortlessly down her shoulders in natural waves.

She opted for minimal accessories and wore a pair of large dangly earrings, but chose not to add any other jewelry.

Standing close together for the short, the lovebirds sent loving glances in each other’s direction before the video ended.

Smart: Meanwhile, entrepreneur Mark made a friendly figure in a black tuxedo that he wore with a crisp white and dark tie

Smart: Meanwhile, entrepreneur Mark made a friendly figure in a black tuxedo that he wore with a crisp white and dark tie

Love: He put his arm around the actress

Love: He put his arm around the actress

Turning heads: Bella made a very glamorous entrance from a water taxi

Turning heads: Bella made a very glamorous entrance from a water taxi

After nine months of dating, Mark popped the big question earlier this year in May, shortly before Mother’s Day, at the actress’ California home.

While talking excitedly about her engagement to the Bad Vegan producer, Bella reflected on the first crossing paths with Mark and shared it Fashion in May: ‘It was love at first sight when the sun came up.’

After he popped the big question and the star said “Yes,” she soon shared a joint post with Vogue Weddings to show off the 10+ carat diamond ring.

She also uploaded a post of her own with a montage of photos, including another image showing off the eye-catching ring on her finger. “my love,” she captioned the Instagram carousel.

Speaking to Vogue, the star also hinted that she’s hoping for a wedding in the countryside in Britain, and regarding dresses, Thorne said “vintage Schiaparelli or Dior” are possible.

The Shake It Up actress humorously told the outlet, “Every bride needs not one dress, but four!”

Bella was in a previous relationship with Italian singer Benjamin Mascolo from 2019 to June 2022. The former couple got engaged in March 2021, which ended after their divorce in June last year.