PICTURE EXCLUSIVE: Isn't love Fantastic! Jamie Bell and bikini-clad Kate Mara make no attempt to hide their romance as they walk her dog

Their close friendship off the screen has ignited romance rumours.

And Fantastic Four co-stars Jamie Bell and Kate Mara did all but confirm that they are an item with their intimate behaviour as they enjoyed a walk on the beach. 

Their arms wrapped around one another, the two snuggled up as close as they could, gazing into one another's eyes and talking closely as they strolled on the sand in Malibu.

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Isn't love Fantastic! Jamie Bell and bikini-clad Kate Mara make no attempt to hide their romance as they walk her dog on the beach on Monday

Isn't love Fantastic! Jamie Bell and bikini-clad Kate Mara make no attempt to hide their romance as they walk her dog on the beach on Monday

Close: Their arms wrapped around one another, the two snuggled up as close as they could, gazing into one another's eyes and talking closely as they strolled on the sand in Malibu

Close: Their arms wrapped around one another, the two snuggled up as close as they could, gazing into one another's eyes and talking closely as they strolled on the sand in Malibu

For their half-hour walk the two made no attempt to let go of one another, except for a brief moment when Kate put her dog's leash back on.

Both went shoeless for the casual stroll, with shirtless Bell displaying his muscled chest in a pair of shorts.

Kate wore an orange bikini and matching wrap around her waist. 

Looking good: For their half-hour walk the two made no attempt to let go of one another, except for a brief moment when Kate put her dog's leash back on

Looking good: For their half-hour walk the two made no attempt to let go of one another, except for a brief moment when Kate put her dog's leash back on

Casual: Both went shoeless for the stroll, with shirtless Bell displaying his muscled chest in a pair of shorts

Casual: Both went shoeless for the stroll, with shirtless Bell displaying his muscled chest in a pair of shorts

Cuddling up: The show of togetherness follows weeks of speculation that the pair's long-term friendship has blossomed into romance

Cuddling up: The show of togetherness follows weeks of speculation that the pair's long-term friendship has blossomed into romance

The show of togetherness follows weeks of speculation that the pair's long-term friendship has blossomed into romance.

Kate and Jamie were often seen out and about together in New York as they drummed up interest for Fantastic Four, which bombed at the box office after it opened earlier in August. 

Then on Sunday, stylist Johnny Wujek Instagrammed a photo of his gal pal Kate, 32, resting her head against the 29-year-old's bare chest on the beach with friends. 

Still denying it? Kate and Jamie were often seen out and about together in New York as they drummed up interest for Fantastic Four, which bombed at the box office after it opened earlier in August

Still denying it? Kate and Jamie were often seen out and about together in New York as they drummed up interest for Fantastic Four, which bombed at the box office after it opened earlier in August

Both single: Kate split from her long-term boyfriend Max Minghella in August last year, while Jamie has a son with estranged wife Evan Rachel Wood

Both single: Kate split from her long-term boyfriend Max Minghella in August last year, while Jamie has a son with estranged wife Evan Rachel Wood

'Celebrating the Full Moon in Malibu last night w/ this lot of Goof Balls. #ilovemyfriends #crystals&tequilla,' Johnny captioned the picturesque image.

Both clutching what appeared to be a glass of white wine, the pair dressed casually for their festive outing.

However an insider told E! News back in May: 'They are the very best of friends, long-time friends. Nothing more.' 

Keeping active: For their half-hour walk the two made no attempt to let go of one another, except for a brief moment when Kate put her dog's leash back on

Keeping active: For their half-hour walk the two made no attempt to let go of one another, except for a brief moment when Kate put her dog's leash back on

This way! The pair shared the dog walking duties by taking turns on the leash

This way! The pair shared the dog walking duties by taking turns on the leash

Jamie has a son with estranged wife Evan Rachel Wood; the pair separated in May last year after 19-months of marriage.

Jamie and Evan previously dated in 2005, before splitting a year later. 

But they rekindled their romance in 2011, leading to their wedding in the October of 2012.

Romance under the moonlight? Jamie and Kate did little to dismiss romance rumours when they cuddled up on the beach in an Instagram photo shared by stylist Johnny Wujeck on Sunday

Romance under the moonlight? Jamie and Kate did little to dismiss romance rumours when they cuddled up on the beach in an Instagram photo shared by stylist Johnny Wujeck on Sunday

They have great chemistry! Kate and Jamie were spotted together in New York City in August

They have great chemistry! Kate and Jamie were spotted together in New York City in August

Stepping out in style: The pair matched in olive green when they were spotted out and about in New York in August

Stepping out in style: The pair matched in olive green when they were spotted out and about in New York in August

Belt up in a military mini skirt by Louis Vuitton

Day after day over the summer, Kate Mara gave us killer looks while promoting her latest flick, The Fantastic Four.

When speaking of 'fantastic' we can't help but use it to describe this belted, utilitarian style Louis Vuitton skirt Kate wore with a delicate lace top while arriving in New York.

The simple A- line symmetry of the skirt that cuts high above her knees also features double belted military embellishments. The exposed zipper adds an edge to the flirty silhouette.

We love the distinct contradiction in pairing a feminine lace top with something this strong and uniform.

Kate's skirt hails from LV's Fall RTW collection which means it hasn't hit the racks just yet. So we've sourced some similar selections in our edit below to hold you over in the meantime.

* PRICES MAY NOT BE AS ADVERTISED

In a statement announcing the split at the time, a spokesperson told Us Weekly: 'Evan Rachel Wood and Jamie Bell have decided to separate.

'They both love and respect one another and will of course remain committed to co-parenting their son. This is a mutual decision and the two remain close friends.'

Kate, meanwhile, split from her long-term boyfriend Max Minghella in August last year. 

Pep in their step: The co-stars enjoyed an iced coffee during an outing in New York in August

Pep in their step: The co-stars enjoyed an iced coffee during an outing in New York in August

Disappointment: Fantastic Four disappointed at the box office when it opened in August; Kate starred as Invisible Woman

Disappointment: Fantastic Four disappointed at the box office when it opened in August; Kate starred as Invisible Woman

In character: Bell portrayed The Thing in the recently released Fantastic Four

In character: Bell portrayed The Thing in the recently released Fantastic Four

 

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