A Harry Ramsden's is set to open at Blackpool Tower this summer as part of a £2.4m investment.
The fish restaurant and quick service outlet will become the rebranded northern flagship for the restaurant chain. It will take over the unit previously occupied by the Tower Lounge bar and a further eaterie will also be added to the Tower complex.
The restaurant's operator will invest £2m, while Blackpool Council will be contributing £400,000 towards the building work.
The new Harry Ramsden's will create 100 jobs and safeguard 30 existing jobs in the town.
Joe Teixeira, CEO of Harry Ramsden's, said: "With the town continuing to attract record numbers of visitors, we believe the time is right to further invest in Blackpool.
"We are delighted that, as a result of this decision, not only are jobs being secured but new jobs are being created. We are especially pleased that so many of the people currently working on the project are locally based, this in itself gives an immediate boost to the Blackpool economy.
"Having served the generations for over 85 years at Harry Ramsden's, we pride ourselves on being a family brand."
Kate Shane, head of the Merlin Blackpool Cluster, added: "This is a hugely exciting event for Blackpool Tower and the resort as a whole.
"The new restaurant and eateries perfectly complement the Tower attractions, will enhance the customers' experience significantly and of course completes the ground floor refurbishment of this very special building."
Councillor Mark Smith, cabinet member for business and economic development, said: "The private investment being made in Blackpool's most prominent public asset and the jobs it creates is yet another demonstration of the steps the town has taken in creating a vibrant economy."