The cast for the upcoming 19th season of CBS's Big Brother has been revealed. The 16 contestants who'll share a house together this summer includes a rodeo clown, a stay-at-home dad and a microbiologist.

Having a microbiologist -- someone who examines organisms under a microscope all day -- certainly feels appropriate for a show like Big Brother, doesn't it?

The cast members are:

This is the first entirely new set of cast members in years for the hit show. News of the cast leaked early online, possibly as a publicity stunt by CBS. You can now watch videos featuring all 16 contestants on CBS All-Access.

The long-running reality program, hosted by Julie Chen, features a group of houseguests living together while HD cameras and microphones track their every move. Each week, one person gets voted out of the house, until only one is left -- the winner of $500,000.

Big Brother premieres next week on Wednesday, June 28 at 8 p.m. ET.

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