The 25-year-old former personality on The Hills was spotted frolicking in a mix and match bikini in the Pacific Ocean.
But despite being on a family holiday, her brother and former co-star Spencer Pratt was nowhere to be seen.
Beach babe: Stephanie Pratt stepped out of the waves during a family holiday in a cute mix matched bikini while in Hawaii
Instead she had some alone time with her parents and tweeted yesterday: ‘Just went paddle-boarding w my dad-im obsessed!!! SO FUN.’
And luckily Stephanie brought a range of bikinis to wear on her vacation, as she has already lost one of her swimsuits.
She tweeted: ‘Left my bikini bottoms on balcony to dry and they blew away! LOL.’
Stephanie rose to fame on the MTV reality show in 2007 as Spencer’s angry sister, who battled a series of personal problems such as being arrested for driving while under the influence of alcohol.
Tiny two-piece: The former cast member of The Hills looked great in her colourful swimsuit and oversized sunglasses on the beach
Family reunion: Stephanie went to Hawaii with her family, but her brother Spencer Pratt, who she famously fell out with, was nowhere to be seen
Miss Pratt, who is also Heidi Montag’s sister-in-law, famously fell out with her brother on the show after a series of bitter feuds.
So it was no surprise that Spencer and his wife Heidi didn’t join the Pratt family in Hawaii.
Since leaving The Hills when the series came to an end in 2010, Stephanie has played herself in The Spin Crowd but has failed to pick up another permanent role on a hit show.
She has also been open about battling with her body image and said while filming The Hills: ‘I was horrified. I remember saying, I can’t believe how huge I look walking over to Lauren.
Soaking up the sun: The 25-year-old was working on her tan by running around the beach
Rise to fame: Stephanie rose to fame on the MTV reality show in 2007 as Spencer’s angry sister, who battled a series of personal problems
‘The producers never put pressure on us to lose weight, but it’s embarrassing working with skinny girls.’
But the blonde, who has battled with bulimia and substance abuse problems in the past, looked healthy and happy on her recent trip.
She was arrested for the DUI in October 2009 and subsequently checked into a rehab facility for a 30 day residential programme.
Water babe: The reality TV star went for a swim but forgot to take her sunglasses of before diving in
Life after The Hills: Since leaving The Hills when the series came to an end in 2010, Stephanie has played herself in The Spin Crowd
In an interview with US Weekly in 2007 she also revealed that she had a problem with shoplifting in the past.
Stephanie discussed one incident in which she shoplifted $1,300 worth of merchandise from the up-scale department store Niemen Marcus, in Honolulu in 2006, while working as a production assistant on the hit show Lost.
Family feud: Stephanie famously fought with her brother Spencer (right) on the show, who is married to Heidi Montag
Hit show: Stephanie (far left) posing with her castmates from The Hills, Audrina Partridge (top left) Kristin Cavallari (centre) and Lo Bosworth (right)