Revealed: the fitness guru who keeps our stars in tip-top shape
MEET the woman responsible for the fabulous figures of Ireland's biggest female stars.
Siobhan Byrne (33) is the woman behind the enviable curves of Kathryn Thomas, Grainne Seoige and Rosanna Davison.
The personal trainer helps keep the TV stars and top model in tip-top shape, thanks to her regular workout sessions and diet plans.
"Kathryn and Rosanna are extremely hard workers. People think they just come in and do cardio, but they actually work as hard as most of the men in our gym," she told the Herald.
"They do a lot of heavy weights to get muscle tone in the body -- they're committed."
Siobhan and Operation Transformation host Kathryn abseiled down the Aviva Stadium together last year and have developed a close friendship over their love for fitness.
Kathryn (32) has been working with the blonde instructor twice a week since early 2011.
"Kathryn is like my Duracell bunny, she'll whip any guy's butt in the gym -- she really gives them a run for their money.
"You can see she has a nice shape and she looks great, but she's put in a lot of work."
Enlisted with the task of ensuring there are no lumps or bumps to be seen on camera, Siobhan admitted: "You become an agony aunt to your clients, you're helping them.
"Myself and Kathryn would go for drinks together and meet up a lot because you do become close friends. You're getting them ready for their next big project so you have to fit your plans into their life."
Siobhan is married to Paul Byrne, of BodyByrne, and he is fitness guru to Keith Duffy and Brian Kennedy.
Kathryn and Rosanna opt for high protein and vegetable diet plans and have cut out all starchy carbs from meals.
"They are really star pupils, they have very controlled diets and are very organised -- Rosanna especially so because she's a vegan."
Another high-profile client of Siobhan's is mum-of-one Grainne Seoige (38).
"Grainne is like a woman possessed in the gym. You have to remember that this is an important factor of these girls' livelihood, to look and be at their best."
Siobhan and Kathryn teamed up with the Crimecall presenter for the annual Ironman Challenge in Galway last September.
Dubliner Siobhan, who married Paul in September 2010 in Ibiza, recently took on TV3's No Pain No Gain challengers Debbie Allen from Q102 and journalist Triona McCarthy.
"We're two weeks in at the moment and the girls are doing so well."