Update! A preview video has been released by CBS showing 3 of the 13 Big Brother 10 houseguests! Watch the video here.

Tuesday morning on The Early Show on CBS, Julie Chen, the host of Big Brother, will reveal the Big Brother 10 cast. The Early Show runs from 7am until 9am, so you can rest assured they’ll save this juicy tidbit for the bitter end (8:30am-9:00am). As soon as those details roll out I’ll be posting them here on Big Brother Network. Sign up for the free update alerts and don’t miss a thing!

I was hoping for some leaks this evening, the night before the official reveal, as we’ve had in the past few seasons, but so far no luck. I’ll keep checking though, so you keep checking back here and I’ll keep you updated.

One tidbit so far though. WeLoveBigBrother caught on to this one. Nothing huge, but still interesting. Last week I previewed for you the rumored cast list for BB10, but another list included a 75 year old grandfather. Looks like that part is true:

In a rundown of Tuesday’s early show, CBS gave a few details of the cast:

The new houseguests range from a 22 year old bodybuilder to a 75 year old grandfather.

Uh, I’m all for diversity, but when it comes down to physical events that guy is gonna be the one last picked for teams! What do you think? Can a 75 year old man pull his weight and keep up with the typical younger crowd of Big Brother?

Sign up for the free Big Brother updates and you’ll get an email with the BB10 cast info as soon as it is released. Click here to sign-up for updates.

Fun Update: Will the Big Brother 10 cast come into the house to “make friends”? Check out this hilarious video where apparently everyone on reality shows is “not here to make friends.”