Tara Reid looked worryingly thin as she posed in a bikini on the beach on Friday.

The 39-year-old actress showed her alarmingly bony ribcage and large thigh gap as she ran along Miami Beach for a photoshoot.

The shots clearly showed Tara's tiny frame, which has previously sparked concern among fans.

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Too thin? Tara Reid looked worryingly slender as she posed in a bikini on the beach on Friday

Slender: The shots clearly show Tara's tiny frame, which has previously sparked concern among fans

But Tara, who has just signed up for Sharknado 3, seemed to be enjoying herself, in a series of posts from a bridal shower she posted on social media.

The American Pie alum cozied up with a gal pal as they soaked up the sunshine in a snap she captioned: 'At the beach with the girls so fun!'

The 39-year-old has previously laughed off criticism of her figure, claiming she was born with a thin physique.

The 39-year-old has previously laughed off criticism of her figure, claiming she was born with a thin physique

'I'm just a small boned girl, you see?' she told TMZ in late 2014. 'I eat, I eat, I eat, I eat.

'Some people eat too much you yell at them - they're fat,' Tara said, referring to any critics saying her body was too frail looking.

'I'm just what I am,' she said. 'So if you wanna get mad at me cause I'm skinny, go ahead. I am what I am.'

For you? A friend appeared to be handing over a phone to Tara

Kick back and relax! The American Pie star flashed a cheery wave and smile as she lounged on a chair

However while she claims to eat well, Tara has openly discussed her body issues.

Indeed she recently admitting to undergoing 'body contouring' liposuction which left her misshapen.

She said of her disastrous procedure: 'I got lipo because even though I was skinny, I wanted – I’m not going to lie – a six-pack.

Some R&R! The actress was no doubt ready to soak up some rays

She said what? The girls smiled and giggled while surrounding Tara, who was glued to her phone

'I had body contouring, but it all went wrong. My stomach became the most ripply, bulgy thing.'

And speaking to Britain's Closer magazine last year she claimed her body was 'completely butchered' by plastic surgery.

'I can’t say I’m never going to have more surgery as I don’t know how I’ll feel in a few years time,' she said.

'Right now I’m happy with my body, though. But the mental and physical pain I went through after I had the surgery was horrific. I went through two years of living in denial and everyone saying how bad my body was.'

Girls only! Tara revealed in her Instagram caption she was attending a Bachelorette party with her pals

'Another day in paradise': The star looked relaxed and revived in a selfie she shared on Monday