The identities of the five additional houseguests were revealed Tuesday night (July 8) during the series premiere of "Big Brother 4" on the CBS Television Network. As was previously announced last week, during the premiere episode, five of the people in the house were surprised by a twist in the reality show called the "X-Factor," in which their ex-boyfriends/ex-girlfriends joined them in the house as participating houseguests.

The five additional HouseGuests are:

Name: Robert Roman (Erika Landin’s ex)
Occupation: Restaurant Manager
Age: 33
Hometown: Los Angeles

Name: Michelle Maradie (David Lane’s ex)
Occupation: College Student
Age: 19
Hometown: Boca Raton, Fla.

Name: Amanda Craig (Scott Weintraub’s ex)
Occupation: Bar Manager
Age: 25
Hometown: Chicago

Name: Justin Giovinco (Alison Irwin’s ex)
Occupation: Head Hunter
Age: 22
Hometown: Pittsburgh, Pa.

Name: Jee Choe (Jun Song’s ex)
Occupation: Bookkeeper
Age: 23
Hometown: Elmhurst, N.Y.

"Big Brother 4" will be broadcast on Wednesdays (9:00-10:00 PM, live ET/delayed PT), beginning July 9, and Fridays (8:00-9:00 PM, ET/PT), effective July 11. The Wednesday edition will feature the live eviction of one of the HouseGuests beginning July 16. The reality show follows the group of 13 people as they live together, confined in a house, with no contact with the outside world -- and 42 cameras and 56 microphones recording their every move 24 hours a day. One by one, the HouseGuests will be evicted during each Wednesday’s live show. At the end of the series, the last remaining HouseGuest will receive the $500,000 grand prize.

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