Sam Jackson made a name for herself as the motivated coach who keeps her clients on their toes - and after striking up an unlikely friendship with actor-client Mel Gibson, the two have been gym buddies ever since.
Now, her little black book of A-list clients continues to grow - with the personal trainer set to take on her biggest project to date, coaching the entire cast of a brand new major movie.
RELATED: How A Perth Local Helped Mel Gibson Lose 14kg In 8 Weeks
Legendary guitarist Kenny Wayne Shepherd - who is married to Mel Gibson's daughter Hannah - has also enlisted Sam's help.
Losing the dad bod
"You've got to know your waist circumference - it should be well under 100cm for guys," Jackson said.
"It's also important to watch your portion sizes as well - and avoid sugar, fats and alcohol. They're the three substances that'll make your belly fat grow.
"Don't do fad diets - they're just going to do you harm - and get some exercise every day because our bodies were made to move."
Find out more about her on her website and her program Thrive For Life here.
This article originally appeared on 7NEWS