Lucy Mecklenburgh, 22, is known as a fitness bunny, thanks to the fact she's the owner of the UK’s number one online fitness programme, Results With Lucy.
And now the former The Only Way Is Essex star has revealed that she really DOES get results after posting a series of shots of herself and little sister Lydia, both of whom are sporting a seriously toned physique.
The joint workout, which appears to have been the sisters' first together, looks like it was a tough one, involving hand weights and more.
Lucy captioned the first shot, which showed the sisters in coordinating pink workout tops and black leggings, as: "Training with @lydiameck"
The second snapshot featured the pair's washboard abs, with Lucy commenting: "1st workout with my sis complete .. Don't think she wants to train with me again haaa"
Lucy launched her own fitness website and programmed, Results With Lucy, after leaving TOWIE.
Together with personal trainer Cecilia Harris, the 22-year-old's website features video routines so people can work out with Lucy and Cecilia at home.
We wonder if sister Lydia will be making an appearance any time soon?