Fisher Brothers, which is spending $65 million to upgrade the public spaces and lobby of 1345 Sixth Ave. between West 54th and 55th streets, didn’t take long to find a “prime” restaurant to replace shuttered Circo.

Quality Branded, owners of steakhouse chain Smith & Wollensky as well as Quality Meats and Quality Italian, has signed a 20-year lease for nearly 10,000 square feet on the ground and lower levels. Industry sources said the ground “ask” was $250 per square foot.

Quality Branded is owned and operated by Smith & Wollensky founder Alan Stillman, his son Michael Stillman and chef Craig Koketsu. The yet-to-be-named eatery is to open in late 2019.

Landlords Ken Fisher and Winston Fisher said the restaurant will have a “new concept,” but declined to be more specific.

Fisher Brothers was repped in-house by Marc S. Packman and Clark Briffel with CBRE’s Eric Gelber and Jordan Kaplan.