William O'Rourke, born in London, England, is a cricketer with roots tracing back to New Zealand. Hailing from Kingston upon Thames in London, O'Rourke inherited his cricketing prowess from his lineage. His father, Paddy O'Rourke, made waves as a fast bowler for Wellington, while his uncle, Matthew O'Rourke, left his mark with a solitary senior appearance for Auckland. O'Rourke's cricketing journey took flight early on, representing Auckland in age-group competitions before relocating to the South Island for his tertiary education at the esteemed University of Canterbury.

His meteoric rise caught the attention of selectors, earning him a spot in New Zealand's squad for the 2020 Under-19 Cricket World Cup. Following standout performances for Burnside West Christchurch University Cricket Club, O'Rourke's elevation to the Canterbury 'A' team was inevitable. Notably, he showcased his prowess with 10 wickets during the National Provincial A Tournament.

In January 2021, O'Rourke's talent was on full display as he donned the New Zealand XI jersey in two T20 matches against the touring Pakistan Shaheens. Recognition followed as he secured his first domestic contract with Canterbury Cricket, marking the beginning of a promising professional career. His List A debut against Otago in January 2022, in the 2021–22 Ford Trophy, was a testament to his burgeoning talent, swiftly followed by impactful performances in T20 and first-class formats.

O'Rourke's journey reached new heights in 2024 when he made his Test debut against South Africa on February 13. His stellar performance, marked by a memorable five-wicket haul in the second innings, etched his name in New Zealand cricketing history. A few months later, O'Rourke found himself on a flight to India, where New Zealand made history by becoming the first team to inflict a Test series whitewash on India in their own backyard.