'Celebrity Big Brother' Cast All Making the Same Money for Season 2 Start

The new batch of celebs who'll be living in the 'Big Brother' house for another season of drama are filling with one thing in common -- starting salaries ... TMZ has learned.

Sources familiar with the contacts for all 12 stars in season 2 of "Celebrity Big Brother" tell us each of them will rake in $100k ... just for entering the house. The winner can walk away with an additional $250k.

In other words, Anthony Scaramucci isn't more important than Dina Lohan this year ... at least not from the jump, money-wise.

Our production sources also tell us the houseguests had been sequestered in separate hotel rooms for 4 days prior to entering the house Wednesday. We're told CBS brass didn't want anyone in the cast knowing who else was set to appear until the premiere.

Other celebs set to appear on 'CBB' include Natalie Eva Marie, Ryan Lochte, Joey Lawrence, Kato Kaelin, Lolo Jones, Tom Green, Kandi Burruss, Tamar Braxton, Jonathan Bennett and Ricky Williams.

Side note ... the American version of 'CBB' doesn't pay nearly as much as its U.K. counterpart. Just look at what Speidi made, not to mention Ray J. Big difference.