Monday's late night guests will be keeping folks laughing as funny guests such as Jack Black, Don Rickles and Steve Carell will all make Labor Day appearances.

Jennifer Aniston will be guest starring in NBC's "30 Rock," her rep confirms. This will be her first appearance in the network since her "Friends" stint.

The kids on "Desperate Housewives" certainly grow up fast. Maybe that's because when the show returns in September for its fifth season, it will have fast-forwarded five years -- which means the kids will go from tots to teens.

NBC's late night talk shows continue their Olympic theme Friday night, as Jay Leno will welcome gold medal gymnast Shawn Johnson and Conan O'Brien will welcome Bob Costas, who spent two weeks in Beijing as a commentator.

Country singer John Rich, who is host of the CMT show "Gone Country," will take his country-wannabes on a tour bus Friday night. The group won't be singing in stadiums, however, because Rich is taking them to prison to entertain some hardened convicts.

Ricky Schroder has come a long way since his days as a child star on "Silver Spoons." Now, a respected director and actor, he has signed to direct "Hellhounds," a telefilm that will air next year on Sci Fi Channel.

NBC is having a great summer. First they had a ratings hit with the Olympics, and to make things a little better they also had a hit with the summer series "America's Got Talent." Thanks to the success of the show, and the talent of Americans, the show has been renewed for a fourth season.

Rumer Willis has been cast in hit U.S. TV show "Army Wives." The 20-year-old daughter of Bruce Willis and Demi Moore - who can soon be seen in "The House Bunny," a comedy set in Hugh Hefner's Los Angeles' Playboy mansion - will play the wife of a young soldier injured in Iraq in one episode.

Celebrity fashion stylist Rachel Zoe has helped "auf'd" the latest designer on Wednesday's "Project Runway" as she guest judges on the "Fashion that Drives You" episode of the show.

Since swimming his way to Olympic victory, Michael Phelps has scored morning and late night show guest appearances, "SNL" hosting gig, MTV VMA presenting job, and now, an "Entourage" cameo.

NBC, which aired the Olympics, continues to shine gold as Olympic athletes stop in for visits with late night talk show hosts Jay Leno and Conan O'Brien, which are of course NBC shows. On Thursday night Jay will have a visit from swimmer Natalie Coughlin while Conan welcomes Aaron Peirsol.

The CW is only days away from launching the new "Beverly Hills, 90210," a remake of a teen show that sparked drama and fashion in the '90s.