'He's a cracking bloke, really positive' - Brendon McCullum visits very brave boy fighting leukaemia

A young, inspirational Canterbury boy, diagnosed with leukaemia in March, has put the biggest smile on the dial of former Black Caps captain Brendon McCullum.

Jonty Gray, 8 , was diagnosed in March and today spent some time with former Black Caps captain McCullum. Source: 1 NEWS

McCullum, who visited eight-year-old Jonty Gray at Christchurch Hospital today, described the young fighter as a "cracking bloke" after spending time with him in the children's ward.

"He's a really positive kid, he never lets anything get him down... what he's going through is horrible for him, and his parents," McCullum told ONE News.

Young Jonty was diagnosed with leukaemia in March and will be undergoing treatment for the next three years at Christchurch Hospital.

It is hoped money raised from this year's New Zealand Cup and Show Week will raise money for the Maia Health Foundation to help improve the children's wards for kids like Jonty.

Jonty shared an extravagant wish list with Brendon today.

That list included a bigger space to play, arts classes, a trampoline for his siblings to use and an exercycle for his mum.