Big Brother (Australian TV series) season 15

Big Brother Australia 15, also known as Big Brother Australia 2023, was the fifteenth season of the Australian reality television series Big Brother. The season began airing on 6 November 2023 on Seven Network. Sonia Kruger returned as the host of the show. The series was initially teased as Big Brother: House of Love and featured a younger cast consisting of single housemates.

On 6 December 2023 Tay & Ari Wilcoxson won the series becoming the second joint-housemate winners in the history of the Australian version of Big Brother, after the Logan twins won season 5.

Production
In October 2022 Seven Network announced that Big Brother would return for a fifteenth season. It was initially given the title Big Brother: House of Love and was teased to feature "a younger cast of sexy singles looking for love". The format was criticised on social media by viewers who said [the show] really needed to go back to the old Big Brother [format]". The series was again pre-recorded, and filming began on 31 October 2022. Following the criticism, the "House of Love" title was dropped, and after the conclusion of filming Seven Network described the series as the "spiciest yet" and a "more stripped-back, traditional Big Brother, where the cast is younger".  It was also confirmed that the spin-off show Big Brother Uncut would return after seventeen years, having last aired during the sixth season. The season ran for 25 days, the shortest civilian season in Big Brother Australia history.

The season ended in a pre-recorded finale, similar to Big Brother VIP, where three possible endings were filmed for each of the finalist ahead of time with the outcome of Australia's vote determining which was broadcast.

International broadcast
The season aired in New Zealand, with episodes being made available via TVNZ+ the day after their broadcast in Australia. The Uncut episodes were not made available.

Housemates
The housemates were revealed in October 2023 and were described by Seven Network as the "sexiest housemates in Australia".

King and Queen of the House
Introduced on Day 2 was the title of "King and Queen of the House". The house will elect a King and a Queen, who will have access to the Suite.

Voting history

 * Key
 * This housemate was nominated for eviction.
 * This housemate was the nominating Housemate on this round.
 * This housemate was immune from this round of eviction due to a twist.
 * This housemate won the challenge and is immune for this round of eviction.
 * This housemate was originally nominated but won a second chance and was thus saved from eviction.


 * Notes

Viewership
This season returned with 274,000 metro viewers, which is half the viewers of last season premiere of 487,000. The second episode fared no better with only 213,000 viewers and losing another thousand viewers in episode three at 212,000. By the fourth episode, the season had dropped almost half of its premiere viewers with only 183,000. Due to low viewership, subsequent episodes were moved from 7:30 to the 8:30 timeslot from 13 November, with a double episode on the 15th. The season finale drew 152,000 viewers, down from season 14's 363,000 viewers.

Criticism
This season of Big Brother has been negatively received by viewers saying it resembles more a dating show than a social experiment. In particular, the season was unfavourablebly compared to Love Island, Married at First Sight, and the concurrently airing reboot of the British version. Criticism was also pointed to the lack of diversity – including the few People of Colour and the lack of LGBT participants.