The two acts have been confirmed to play the Virgin Media Our House pop up house party at the two-day music event, which takes place over the weekend of August 17-18 at Weston Park, Staffordshire, and Hylands Park, Chelmsford.
The house party will be free to all festival goers at both sites and Rudimental will perform a DJ set on Saturday in Staffordshire and on Sunday in Essex.
The electronic group said: ''We're delighted to be playing at Virgin Media's Our House this year. It's been an amazing summer and it just keeps getting better now that we're headlining at one of the biggest festivals. Our album is called 'Home', so Our House is going to be our home for the night and we're going to blow the roof off!''
DJ Fresh has revealed he will be performing with special guests for his 'Our House' set.
He said: ''I'm going to be bringing an exclusive performance and collaboration to the stage this year. Festival season is my favourite time of year and I love playing these more intimate sets!''
Other acts performing sets at Our House - which will have laptops hooked up with Virgin Media's super-fast fibre optic broadband to help fans go online - include Toddla T Sound, Jaguar Skills, Krafty Kuts and A Skillz.
On-site Virgin Media customers will also be given exclusive access to a chill-out area, Our Garden - with opportunities to win amazing prizes.