Swimwear that bares it all is usually the preserve of the young, fit and toned twentysomething.
But now, as recent images of ultra-fit celebrities like Sean Penn, Paula Hamilton and Melanie Griffith reveal, it would appear that the over-fifties are proving they can still look fabulous – and flaunt it.
Model Paula Hamilton, 51, who entered the Celebrity Big Brother house last night, showed just what it takes to retain her youthful figure as photographs emerged of the star practising some very impressive yoga moves poolside – wearing a tiny pink bikini.
Fit at fifty: Paula Hamilton and Melanie Griffith show off their toned and trim bodies
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The exercise enthusiast, who made her name in the 1980s in an advertising campaign for the VW Golf, has such a passion for yoga that she even released her own DVD, The Y Plan, to teach those at home how to get a supermodel body.
Another fit fifty who also relies on yoga to keep her in top shape is 55-year-old Melanie Griffith.
Supple: Melanie Griffith practices yoga to stay in shape at her age
The actress and mother-of-three can often be spotted out and about in Los Angeles in her trusty Lycra gymwear after a yoga class.
Speaking to US Weekly, Mrs Antonio Banderas said: ‘I don’t know if I look that great.
‘[But] I work out a lot. I have a trainer that I [work with] four times a week, and I do hot yoga.’
Representing the fit fifty-plus males is Sean Penn who showed off his rippling six-pack on the beach yesterday.
Gym bunny: Melanie can often be spotted leaving her yoga or training sessions
The two-time Oscar winner looked like he was in the best shape of his life as he strolled on the sand in nothing but blue snowflake-patterned swim trunks.
The Milk star – sporting shoulder-length hair and a moustache – used the picturesque Hawaiian getaway to flaunt his sinewy arms with bulging veins, six-pack abs, and defined pecs.
It is clear to see why the single stud has romanced numerous beauties over the years, including models Brigitte Nielsen, Petra Nemcova, Jessica White, and actress Scarlett Johansson.