Yes she's obviously had some work done , just compare the before/after pictures .
But she's a world away from the plastic looking women on Reality/Social Media TV ( looking at the TOWIE women -and men- in particular )
The Coronation Street era photos she was earlies 20s , they are very much give us a smile 'Chelle type she looks a bit gauche .
Now she's definately posing , using all the tricks of angles. lighting , making her face more elongated etc.
She was really good in Brassic , I watched "Missing You" but mainly 'cos I liked the coat she was wearing . 
Any photos now where the Papparazzi will be out trying to get a shot will either be "First time Mum looks knackered " or "Stylish Michelle Keegan showcases tiny tot in xyz (pick designer) pram" (ie she takes her baby out )
They court the Press , so they will need to expect some intrusion.