Sir Cliff Richard and Frankie Valli will headline a festival in the historic setting of Hampton Court Palace in June.
They will be joined by Lisa Stansfield, Imelda May, Jools Holland, Russell Watson and the Royal Philarmonic Orchestra.
Richard will sing in the open air court of King Henry VII for two nights, Saturday 22 and Sunday 23 June. He performed at another Royal dwelling, Buckingham palace, for the Queen's Diamond Jubilee last June.
Valli and the Four Seasons will return after performing to a sell-out crowd at the festival last year - their first performance in the UK for 20 years.
Classical Brit winner Watson will perform with his orchestra. " I'm thoroughly looking forward to performing alongside some truly great artists and musical talent," he said.
The festival will be "All Woman" singer Lisa Stansfield's only London date this year. She said: "After having such a great time last year in the UK with my three sold out shows, I'm so excited to be touring once again and I cannot wait to perform at Hampton Court Palace this June!"