This morning CBS revealed the identities of nine of the thirteen houseguests for "Big Brother 4" in anticipation of the reality series' premiere on Tuesday, July 8 at 8/9 PM, ET/PT. As was announced earlier this week, four of these people will have their exes joining them in the house as participating HouseGuests. None of the contestants knows about this "X Factor." The identities of the four remaining houseguests will be revealed in the premiere episode.

In addition to the wednesday broadcasts, te show will also be air on Wednesdays (9-10 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 nine announced houseguests are:

Name: Alison Irwin
Occupation: Retail Manager
Age: 22
Hometown: Meadville, Pa.

Name: Erika Landin
Occupation: Pilates Instructor
Age: 33
Hometown: Los Angeles

Name: David Lane
Occupation: Former Army Ranger
Age: 21
Hometown: Deerfield Beach, Fla.

Name: Nathan Marlow
Occupation: Personal Trainer
Age: 23
Hometown: Edmond, Okla.

Name: Jack Owens, Jr.
Occupation: Retired FBI Agent
Age: 58
Hometown: Birmingham, Ala.

Name: Brandon Showalter
Occupation: Computer Engineer
Age: 28
Hometown: Newport Beach, Calif.

Name: Jun Song
Occupation: Investment Manager
Age: 27
Hometown: New York

Name: Dana Varela
Occupation: Karate School manager
Age: 28
Hometown: Queens, N.Y.

Name: Scott Weintraub
Occupation: Waiter
Age: 33
Hometown: Chicago

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