The supermodel has splashed out on six Â£500 VIP tickets for the world famous music event in Somerset, England, this weekend and is determined to enjoy herself.
A source said: "Kate is a rock goddess and plans to have a wild time - she doesn't do things by half. She's on Lily Allen's VIP list so it's free drinks all the way."
However, Kate's ex-boyfriend Pete Doherty is playing at the festival - which started last night (25.06.09) - and friends say she is intent on avoiding him.
The source added to Britain's Daily Mirror newspaper: "Her ex Pete is on the bill - if she sees him, she will steer well clear."
Kate - who had her hair cut before going to Glastonbury - has also splashed out on a buggy to ferry her and her pals around the site.
Kate and Lily became friends in January after the model came to the 'Smile' star's concert at London's Roundhouse venue.
They then enjoyed a shopping spree together before spending time at Paris Fashion Week.