Ultimate Big Brother

Ultimate Big Brother was a special series of Big Brother Ireland celebrating 10 years of the show. The series lasted 30 days, airing from 4 September 2010 with the finale airing a month later on 4 October 2010.

Housemates
{| class="wikitable" style="text-align:center; width: 100%; font-size:100%; line-height:18px;" ! colspan="1" rowspan="2"| Name ! colspan="2" rowspan="1"| Series details ! Series ! Status !

Aisling O'Carroll
!
 * Big Brother 5
 * style="background:#FF8072"| Evicted

Benni Collins
!
 * Big Brother 5
 * style="background:#FBF373"| Third Place

Bobby Davro
!
 * Celebrity Big Brother 7 
 * style="background:#FBF373"| Third Place

Cameron Haynes
!
 * Big Brother 10 
 * style="background:#73FB76" | Winner

Charley Henderson
!
 * Big Brother 9
 * style="background:#FBF373"| Eighth Place

Christopher Biggins
!
 * Celebrity Big Brother 3 
 * style="background:#D1E8EF" | Runner-Up

Danniella Westbrooke
!
 * Celebrity Big Brother 5 
 * style="background:#ffccff;" | Walked

Jack Campbell
!
 * Big Brother 1 
 * style="background:#FF8072;" | Evicted

Kerry Katona
!
 * Celebrity Big Brother 2 
 * style="background:#FF8072;" | Evicted

Kieran Gustavsson
!
 * Big Brother 11 
 * style="background:#D1E8EF" | Runner-Up

Michelle Byrne
!
 * Big Brother 5 
 * style="background:#FF8072;" | Evicted

Peter Andre
!
 * Celebrity Big Brother 5 
 * style="background:#73FB76" | Winner

Saskia Sunderlon
!
 * Big Brother 9 
 * style="background:#FBF373"| Fourth Place

Sinitta
!
 * Celebrity Big Brother 1 
 * style="background:#FF8072;" | Evicted

Tom McDermott
!
 * Big Brother 2 
 * style="background:#FF8072;" | Evicted

Zoe Reade

 * Big Brother 4 
 * style="background:#FF8072;" | Evicted
 * }

Voting history

 * Day 3's nominations were a recreation of Big Brother 7's shock nominations where housemates were electrocuted whilst making their nominations.
 * On Day 5 after the double eviction, Aisling and Benni from Big Brother 5 entered the house next door, and were immediately 'Almost Housemates' (Big Brother 7, Celebrity Big Brother 6). They chose Bobby and Kieran to join them as Almost Housemates.