Shirtless Liam Payne packs the PDA with his girlfriend Kate

Shirtless, Liam Payne packs the PDA with his girlfriend Kate Cassidy as they relax on a yacht in Saint Tropez after rekindling their romance

Liam Payne and Kate Cassidy relaxed on a yacht in Saint Tropez, France on Sunday.

The shirtless One Direction star, 29, grabbed the PDA with his girlfriend, 24, as they kissed during their romantic vacation.

Liam and Kate confirmed they had rekindled their romance in early June, just a month after it was announced they had split after a ten-month relationship.

The heavily colored singer looked relaxed as he strolled across the yacht in boxing shorts, while influencer Kate looked incredible in a simple black bikini.

Liam, who shares six-year-old son Bear with ex-girlfriend Cheryl, previously showered affection on Kate as they traveled to the ship by private tender.

Painted!  Liam Payne, 29, relaxed on a yacht in Saint Tropez, France on Sunday

Painted! Liam Payne, 29, relaxed on a yacht in Saint Tropez, France on Sunday

Mwah!  The One Direction star grabbed the PDA with his girlfriend Kate Cassidy, 24, as they kissed during their romantic holiday

Mwah! The One Direction star grabbed the PDA with his girlfriend Kate Cassidy, 24, as they kissed during their romantic holiday

Hot couple: The heavily colored singer looked relaxed as he strolled across the yacht in box shorts, while influencer Kate looked incredible in a simple black bikini

Hot couple: The heavily colored singer looked relaxed as he strolled across the yacht in box shorts, while influencer Kate looked incredible in a simple black bikini

Their holiday comes after Liam opened up about his mental health and revealed doctors diagnosed him with “some medical conditions” after spending some time at a wellness clinic in the US last year after hitting “rock bottom”.

The singer shared a candid Instagram Stories post on Thursday, saying he was having a rough day and family and friends could see he was still struggling.

Liam described “manic” moments in his life and his difficulty staying sober during “super deep” moments.

In the clip, he admitted to filming the video multiple times before deleting it before finally deciding it was the right time to share his story with fans.

He said, “I mean, I’ve filmed a lot for graduate work over time and deleted it, but I don’t know if now is the right time.”

“I know in my last video I mentioned that I’ve been diagnosed with a few medical conditions and I don’t want to go into too much detail but one of them is that there are a lot of manic things in my life that you guys have seen.”

“But the other side of that is and it feels like I lose my sobriety in those moments where I was extremely deep, and that’s how I felt today.”

“And it’s about isolating the two things and seeing them as separate and like now I know what they are.” I’m fortunate to have some amazing people around me who care so much about me, but I’m sure they can see it in me too that I’m “not really here.”

Romantic retreat: The couple enjoyed the sun on the luxury yacht

Romantic retreat: The couple enjoyed the sun on the luxury yacht

Stylish: Liam performed in white trousers and a blue polo shirt while Kate slipped into a pretty floral strapless sundress (pictured with Paul Wesley and Natalie Kuckenburg)

Stylish: Liam performed in white trousers and a blue polo shirt while Kate slipped into a pretty floral strapless sundress (pictured with Paul Wesley and Natalie Kuckenburg)

Quality Time: Kate followed her beau as he typed on his phone

Quality Time: Kate followed her beau as he typed on his phone

Gentleman: Liam offered his helping hand to Kate as they boarded their tender

Gentleman: Liam offered his helping hand to Kate as they boarded their tender

Masters at Sea: Liam oversaw the yacht's crew as they prepared for an al fresco lunch

Masters at Sea: Liam oversaw the yacht’s crew as they prepared for an al fresco lunch

Looking good: Liam looked handsome in his stylish ensemble

Looking good: Liam looked handsome in his stylish ensemble

Hydrated: Liam sipped on a drink while strolling around shirtless

Hydrated: Liam sipped on a drink while strolling around shirtless

Sun-kissed: The couple looked happy as they traveled to the yacht together

Sun-kissed: The couple looked happy as they traveled to the yacht together

He captioned the clip, “I’ve shot the same video about 20 times this year at different times and was too scared to release it by talking myself out of it.”

“I come to see how fortunate I am to be in the position I am in…and I want to give each of you who are in trouble the gift I was given by sharing some of the things I have learned from specialists during my absence.”

“The first thing I did every day was check in, and it’s important not to suppress your feelings. Feelings are one of the amazing gifts we had and I blocked things for so long that I felt nauseous and flipped over… notice it, let it happen and let it happen. I hope it helps’.

Liam said he hit “rock bottom” after his appearance on Logan Paul’s podcast in June 2022 and apologized for taking his anger out on everyone else.

On Saturday, he posted a video titled “I’m Back…” on his YouTube channel in which he discussed seeking professional help.

Liam thanked his six-year-old son Bear and ex-girlfriend and Bear’s mother Cheryl for supporting his decision to get well.

He added that his former bandmates Harry Styles, Louis Tomlinson, Niall Horan and Zayn Malik “stand by me” and “came to my rescue.”