Plunket Shield

The KFC Twenty20 Big Bash was an Australian domestic Twenty20 cricket tournament.

Running over six seasons from 2005–06 to 2010–11, the Twenty20 Big Bash was the first top level domestic Twenty20 competition in Australia, contested by the six traditional Sheffield Shield state cricket teams.

The Victorian Bushrangers were the most successful team during the tournament's running, winning four out of the six titles.

The competition was replaced by the franchise-based Big Bash League from 2011–12.

A design contest was held in 2011 to determine the design of the Big Bash League trophy. The competition was restricted to Australian designers, with the final design, chosen by the public from a field of three, revealed on 13 December 2011.

The Power Surge is a strategic rule where the batting team can activate a two-over "floating" powerplay after the tenth over, allowing only two fielders outside the inner circle, designed to boost scoring and add excitement in the second half of the innings.^[] It replaced the traditional six-over opening powerplay with a four-over initial one, giving teams tactical choice and creating more high-scoring opportunities for the batsmen.^[]

It had been proposed that the tournament would undergo expansion into more regional areas not supported by international cricket. The expansion was originally planned to be implemented in 2012. The proposed teams included: Newcastle, Canberra, Geelong, and Gold Coast. A New Zealand-based team was also mentioned as a possibility which would be based at Auckland or Christchurch, but this is unlikely to happen. The expansion proposal was suspended, mainly because the proposed cities lacked the proper cricket hosting facilities.

In 2015, former Black Caps captain and Melbourne Stars coach Stephen Fleming suggested the expansion of the tournament to include New Zealand teams and become a trans-Tasman competition. He said an expansion into New Zealand would be widely supported by locals. His views were also supported by Brisbane Heat coach and former Black Caps captain Daniel Vettori. Melbourne Renegades chief executive Stuart Coventry also stated that he wants Cricket Australia to grant each club a fifth home fixture next season. Coventry said the BBL was ready to expand from 8 to 10 games, and adding matches would further establish the franchises.

In 2016, Anthony Everard, head of the BBL, flagged the league's intentions to approach expansion through a soft launch. He stated the short to medium term goal was to schedule BBL games involving existing franchises in regional markets before potentially adding new teams after the 2017–18 season when the broadcast deal expired. He also indicated the regional markets of Canberra, Geelong, Launceston, Coffs Harbour, Albury, Moe, Cairns, Gold Coast, and Alice Springs will likely host games during the soft launch period. On 27 January 2017, Everard announced an extra eight matches would be added to the 2017–18 season and implored each existing franchise to look at new markets when considering where the extra games would be played, although the lengthened season was not implemented until 2018–19.

In 2018, it was reported that the Gold Coast Suns were interested in securing a Big Bash League franchise if the competition was expanded.

Cricket ACT has campaigned for an expansion team in both the men's and women's competition. In October 2024, Australian Capital Territory Chief Minister Andrew Barr announced as part of his campaign for the 2024 Australian Capital Territory election, that the ACT Government would provide funding for an expansion team in both the men's and women's competitions in partnership with Cricket ACT, if the territory was granted a team. The proposed team would be based at Manuka Oval in Canberra, where the Australian national team have hosted international fixtures. In July 2025, Cricket Australia (CA) CEO Todd Greenburg floated the idea of expanding the competition to New Zealand, following a Boston Consulting Group (BCG) report on improving and innovating the league. ESPN reported in December 2025 that "New Zealand, which boasts teams in many Australian sports leagues, is an obvious first foray abroad [for the BBL]. Its proximity to the east coast of Australia makes it easier from a logistical sense while being attractive to broadcasters. With New Zealand being two hours ahead of Sydney and Melbourne, and five in front of Perth, having triple headers on game days could create a television bonanza." The CA board was reported to also be considering an expansion into Singapore.

Former women's Test captain and Head of Brisbane's Centre of Excellence, Belinda Clark, revealed on 19 January 2014 that planning for a women's BBL was in its early stages but could become a reality very soon. She stated that the proposal was being considered due to the huge rise in television ratings during the 2013–14 season, and the rise in women's cricket popularity.

On 19 February 2015, Cricket Australia announced that a Women's Big Bash League (WBBL) would commence in the 2015–16 season, with teams aligned to the men's competition. It was announced that the teams would share the names and colours of the existing men's BBL teams, meaning that there would be two teams from Sydney and Melbourne and one team from Adelaide, Brisbane, Hobart, and Perth.

The inaugural Women's Big Bash League was won by the Sydney Thunder against the Sydney Sixers by 3 wickets. The current champion from the 2022–23 Women's Big Bash League season is Adelaide Strikers who won their maiden WBBL title by defeating Sydney Thunder by 10 runs.^[]

In December 2015, Cricket Australia revealed that they are looking into the possibility of hosting a Christmas Day BBL match in the coming years, possibly after the next season. If the proposal is passed, it would have been a first in the history of Australian sport since no professional matches had played in Australia on Christmas Day at that time. "It is something we have just recently started discussing, the possibilities of that. We're talking about playing a Christmas Eve match, we already play Boxing Day," CA's Executive GM (Operations) Mike McKenna said. This has not yet occurred, but in September 2018, it was reported that Cricket Australia had struck a deal with the Australian Cricketers' Association to play BBL matches on Christmas Day.