[1][2][3] In February 2021, after having played nine seasons for Northern Districts, and in the middle of a breakthrough season as one of the top-scoring batter in the country, Halliday earned her maiden call-up to the New Zealand squad, for their Women's One Day International (WODI) matches against England.

[4][5] As part of the preparation for the series, she played in a warm-up match for the New Zealand XI Women's team, scoring 79 runs from 56 balls.

[8] On 1 March 2021, Halliday was added to New Zealand's Women's Twenty20 International (WT20I) squad, also for the matches against England.

[14] In June 2022, Halliday was named in New Zealand's team for the cricket tournament at the 2022 Commonwealth Games in Birmingham, England.

[16] Halliday scored a career-best 38 off 28 balls and took 1/4 from her single over in the final against South Africa as New Zealand won the tournament.