It's a surprising move for the actress, 29, as she recently spoke out about her negative experiences in the murky world of celebrity workouts.
But, according to an insider, she is ready to do it all over again as the new deal allows her to shed the inches 'her way', and not in a way that misled fans and left her feeling very low.
Job done: Natalie Cassidy leaves a gym looking exhausted as rumours mount she is working on a fitness DVD
Her new physique saw her grace the covers of numerous gossip magazines, and at the time, the EastEnders star gushed about how if she could lose the weight then anyone could.
But at home, mum of one Natalie was having to brush off concerns from her close friends and family who worried she was making herself ill with her dedication to keeping the weight off.
Candid camera: Natalie looked shocked to see photographers outside the gym near her home in Hertfordshire
Back on her word: Natalie said she'd never work on a fitness DVD again, but might have changed her mind
'I was really obsessed, I would spend hours thinking about what I could eat the rest of the day. My world revolved around calories. I would have no breakfast, a tiny bowl of soup for lunch then a tiny salad. And that was it.'
But recently a source told the that she would soon be making a follow up to her best selling work out.
'Every year Natalie is approached by companies desperate to make a new DVD. Every year she says no.
'But since recently losing weight again, through a healthy diet and exercise, she has decided she wants to share it with others. She was recently offered the chance to do a DVD her own way so she’s agreed.'
Shaping up: Natalie is in good shape as she embarks on another fitness regime
Cream crackered: Natalie looked worn out as she made her way home after a strenuous work out
But this time around, Natalie has taken a much more sensible approach to her weight loss, signing up for a minimum of six 60-minute training sessions with her personal trainer Rob Horslen every week.
She wore a grey zip-up top, black leggings and Nike trainers for her training session, which judging by the dark circles under her eyes as she left the gym, was a tough one.