The Rachel from Big Brother is Rachel Reilly. She was born on October 16, 1984, which makes her 40 years old as of 2025. Rachel Reilly is well known for her participation and win in the Big Brother 13 season and her return as the mystery houseguest in Big Brother 27 in 2025.
Note: There is also a Rachel Riley associated with Countdown, a completely different TV personality who is 39 years old, born January 11, 1986, and is not related to Big Brother. The Rachel from Big Brother is Rachel Reilly.
