Grosvenor said it has secured another Royal visit to mark the so-called grand opening of Liverpool One, only months after the Queen's attendance for the first phase launch in May.
The identity of the Royal visitor has not been revealed and is expected to be announced in the next fortnight.
On October 1, Grosvenor, the Duke of Westminster's development company, will open the bulk of its £1bn project, with the revamped five-acre Chavasse Park, leisure terrace, 14 screen cinema, and 600,000 sq ft of shops.
The first phase of 1m sq ft of retail, 90% let, opened in May on South John Street and Paradise Street. The scheme is more than 80% let overall.
The October 1 celebrations, handily one month before the British Council of Shopping Centres annual conference in the same city, will feature a street festival entitled 'Access All Areas' which Grosvenor said is a mixture of street entertainment, music and fashion with a fireworks finale.
Fashion shows on Paradise Street will showcase the new autumn/winter evening fashions from the scheme's retailers.
Restuarants set to open in the leisure terrace include Wagamama, Zizzi, Pizza Hut, Las Iguanas, Korova Bars, Café Rouge, Nando's and Gourmet Burger Kitchen.
Among the retailers opening in October are Ted Baker, Reiss, L'Occitane, Ghost, Jigsaw, Flannels, Radley, Fred Perry, G-Star and Jones.
Letting agents are Cushman & Wakefield, Strutt & Parker and Tushingham Moore.