The two former 'X Factor' stars will play the first night of The Great British Weekend, a three-day festival at the venue in the British midlands which takes place between 15 and 17 July and will see a diverse range of performers across the weekend.
Alexandra said: "I'm very excited about performing at Warwick Castle this summer, it's a stunning venue to play and having the castle as a backdrop is going to be incredible. I'm also looking forward to catching up with Olly, it will be a bit of an 'X factor' reunion."
The event - which is in its 13th year - will see Wynne Evans perform on the second Proms night with the English National Orchestra, with renowned theatre conductor Jae Alexander overseeing proceedings.
The final night is billed as a soul and disco extravaganza, with a 10-piece band and dancers giving a performance of music made famous by late 'Thriller' hitmaker Michael Jackson.
For more information, visit www.warwick-castle.com.
The event - which is in its 13th year - will see Wynne Evans perform on the second Proms night with the English National Orchestra, with renowned theatre conductor Jae Alexander overseeing proceedings.
The final night is billed as a soul and disco extravaganza, with a 10-piece band and dancers giving a performance of music made famous by late 'Thriller' hitmaker Michael Jackson.
For more information, visit www.warwick-castle.com.