Nat Wolff and girlfriend Grace Van Patten share a steamy smooch as they pack on the PDA during romantic Sardinia holiday

Their paths crossed while shooting yet-to-be-released comedy Good Posture last year.

And it seems Nat Wolff and Grace Van Patten fell head over heels for one another while filming the flick as the pair confirmed they are very much an item during a romantic trip to Sardinia on Sunday.

The happy couple packed on the PDA as they relished an idle day on the beach before enjoying an intimate lunch in the sunshine. 

Tropic like it's hot: Nat Wolff and girlfriend Grace Van Patten packed on the PDA while sunning it up on a romantic holiday to Sardinia on Sunday

Tropic like it's hot: Nat Wolff and girlfriend Grace Van Patten packed on the PDA while sunning it up on a romantic holiday to Sardinia on Sunday

The Naked Brothers Band star Nat, 23, and Tramps star, 21, looked besotted with one another as they frolicked in the sea, with the Paper Towns star even pulling an impressed face as Grace walked down into the water to join him. 

The actress chose to keep her style effortlessly cool in a simple black bikini, while Nat opted for a pair of vibrant blue swim shorts. 

After their romantic swimming session, the pair retreated to a nearby restaurant to enjoy a sushi lunch, where Grace sported a chic blue polka dot dress.

Sight for shore eyes: The Paper Towns star clearly liked what he saw as Grace walked down into the water to join him

Sight for shore eyes: The Paper Towns star clearly liked what he saw as Grace walked down into the water to join him

Heating up: The happy couple seriously packed on the PDA as they relished an idle day on the beach

Heating up: The happy couple seriously packed on the PDA as they relished an idle day on the beach

Her hair tied into an easy top knot, the star showed off her natural beauty by completely forgoing make-up. 

Once the pair had refuelled they were spotted shooting some hoops in a basketball court - with Grace even slipping on a pair of fitting black Converse for the occasion. 

While the couple are yet to speak publicly about their romance, Grace has shared snaps of the pair on her Instagram page, the most recent of which showed the pair posing in Paris, France, earlier this month. 

Looking good! The actress chose to keep her style effortlessly cool in a simple black bikini, while Nat opted for a pair of vibrant blue swim shorts

Looking good! The actress chose to keep her style effortlessly cool in a simple black bikini, while Nat opted for a pair of vibrant blue swim shorts

Frolicked up an appetite: The couple later headed for a romantic sushi lunch at a nearby restaurant
Frolicked up an appetite: The couple later headed for a romantic sushi lunch at a nearby restaurant

Frolicked up an appetite: The couple later headed for a romantic sushi lunch at a nearby restaurant

In February, Grace posted a picture of herself visiting Nat on the set of his movie Semper Fi, quipping: 'Visitin my conman.' 

The couple will also hotfoot across the globe to promote their upcoming movie, Good Posture, together later this year.

The movie, set in current day Brooklyn, follows a lazy but charming and beautiful young woman who has got used to using men to make her life easier.

However, when she finally pushes one man too far, she is forced to discover that she could live a happier life by taking responsibility for herself instead of using those around her as easy props.  

Effortless beauty: Grace let her natural beauty shine through by completely forgoing make-up for their beach day

Effortless beauty: Grace let her natural beauty shine through by completely forgoing make-up for their beach day

Fashionista: Grace looked chic in a blue polka dot dress and black Converse

Fashionista: Grace looked chic in a blue polka dot dress and black Converse

Staying active: Once the pair had refuelled they were spotted shooting some hoops in a basketball court

Staying active: Once the pair had refuelled they were spotted shooting some hoops in a basketball court

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