Celebrity Big Brother 1 (UK) was the inaugural version of Celebrity Big Brother. Like the regular version of Big Brother (UK), the show featured a number of strangers living in a house together in complete isolation, having to nominate each other for eviction with the public voting on who to evict. Unlike the regular version of the show, however, the six housemates living together were notable celebrities, with the prize money going to charity rather than to themselves. This season, all money raised was given to Comic Relief, with the season finale being held on Red Nose Day 2001.
- Live Nominations: Each housemate was required to make their nominations live during the launch episode, moments after meeting each other. The first eviction would be held the day after, on Day 2.
|1||2||Housemates were required to design a pair of underpants for one of their fellow housemates to wear. The housemates then had to present these underpants as part of a fashion show.||Westlife's version of "Uptown Girl" was played into the house.||Passed|
|2||3||Housemates were required to memorize 10 facts about each of their fellow housemates. They were then called into the Diary Room individually and asked 3 random questions about these facts. If the entire group answered more than 1 question incorrectly, they would fail.||Shopping budget increased by 50% (£18).||Passed|
|3||4||The housemates were given a topiary kit and had until 6:00 PM that day to create a topiary that they would later present to Big Brother.||A film was played for the house.||Passed|
|4||5||The housemates had to create and perform an original song about their time in the house.||The house was provided with a take-out dinner.||Passed|
|5||6||The housemates had to complete a military assault course in less than 7 minutes||Shopping budget increased by 50% (£7.50).||Passed|
|6||7||The remaining 3 housemates were each given a baby simulator called "Juanita" to take care of.||A Wild West-themed party was thrown for the house.||Passed|
|7||8||Each housemate had to paint a picture of their favorite view of the house. They later presented these paintings to Big Brother.||None||N/A|
|Week 1||Week 2|
|Day 2||Day 4||Day 6||Final|
- At 8 days, this is the shortest season of Big Brother across any version of the show.
- This season is tied with Celebrity Big Brother 2 for the record of fewest housemates, with only six each.
- During Anthea's eviction, Jack ran outside to greet his wife. He was promptly sent back inside.
|United Kingdom Seasons|
|Civilian||1 · 2 · 3 · 4 · Teen · 5 · Panto · 6 · 7 · 8 · 9 · 10 · 11 · Ultimate · 12 · 13 · 14 · 15 · 16 · 17 · 18 · 19|
|Celebrity||1 · 2 · 3 · 4 · 5 · Hijack · 6 · 7 · 8 · 9 · 10 · 11 · 12 · 13 · 14 · 15 · 16 · 17 · 18 · 19 · 20 · 21 · 22|
|Big Brother Seasons|