Mark Wright often has women gawking over his physique, but this time he had former X Factor host Dermot O'Leary gushing over his washboard abs.
The former The Only Way Is Essex star has been documenting his journey ahead of the full marathon, which is being held later this month.
Mark, 36, ran the marathon last year and was helped over the finish line by an unsuspecting hero after the reality start started to experience cramp in his leg.
