The store, based at the Peterborough One Retail Park off the Eye Roundabout,has created around 30 jobs in the city, and opened for the first time at 8am.
There was a steady stream of shoppers visiting the store today - the 5th Aldi in the city.
The 18,500 sqft store’s opening times will be 8am to 10pm on Mondays to Saturdays and from 10am to 4pm on Sundays.