Cineworld will be the operator for the 12-screen cinema at Rushden Lakes if planning permission is granted.
The cinema chain was confirmed on the first day of a three-day public consultation into updated plans to include a cinema, bowling alley, additional restaurants and indoor climbing area in the multi-million pound retail and leisure complex.
It comes after the Northants Telegraph revealed last month that the improved leisure offering could replace the garden centre which was originally planned on the west of the site.
The plans by LxB Retail Properties, the developers behind the Rushden Lakes scheme, went on show at Rushden Hall yesterday (Thursday) and will also be there today and tomorrow.
Jon McCarthy of LxB Retail Properties said: “Cineworld has signed, they are committed to the scheme.
“They are our cinema operator.”
We have been bowled over by the overwhelming response and the need for a cinema locallyJon McCarthy
Dozens of people had been through the doors within the first hour of the exhibition, which includes images of the plans and a video taking you on a virtual tour of the site.
Consultation forms are being given to anyone attending and these will be passed onto consultants, with the possibility of comments, views and ideas being incorporated in the final plans before they are considered by East Northamptonshire Council.
Mr McCarthy said: “We have been bowled over by the overwhelming response and the need for a cinema locally.”
A host of big names have already signed up to Rushden Lakes, including Marks & Spencer, House of Fraser and Primark.
While the consultation is carried out, negotiations are continuing to fill the remaining units, with Mr McCarthy saying they have had more interest from firms wanting to have restaurants there than the actual number of units available.
A planning application for the updated plans is expected to be submitted to East Northamptonshire Council in the coming months and likely to be heard by the planning committee early 2016.
Work on the site just off the A45 at Rushden is already well under way, with the site being prepared ready for construction to start early spring.
If the cinema plans are approved, it is hoped that building for that phase of the development could begin in summer 2017.
Rushden Lakes is a £140m leisure and tourism destination which will create 1,900 permanent jobs and open up the surrounding countryside for people to enjoy free of charge.
A total of 30 acres of the 244 acre site on the edge of the A45 will be built on.
The development will include 380,000 sq ft of shops, a pedestrian and cycle bridge over the A45 linking Rushden Lakes to the town, waterfront restaurants, a lakeside visitor centre as well as footpaths and cycle routes.
The Crown Estate agreed a deal to buy the site from LXB Retail Properties earlier this year, although LxB remains involved in the scheme and will be delivering the retail and leisure proposals.
The plans will be on show from 9am to 5pm today (Friday) and from 9am to 2pm tomorrow (Saturday).