Ultimate Big Brother was the final series of the UK reality television programme Big Brother to air on Channel 4. The series was broadcast for 18 days, from 24 August 2010 to 10 September 2010 and was produced by Remarkable Pictures, a division of Endemol. It featured memorable housemates from previous series of Big Brother, and a smaller section of housemates from Celebrity Big Brother. A 24-hour live streaming service was also available via the Big Brother website as a fee-based service.