Credit: Scott Alan Humbert/The CW ©2011 The CW Network Photo: Naomi Performs in the Talent Show on 90210 Season 4, Episode 6: "Benefit of the Doubt"

Don't let the photo fool you — we don't yet know which 90210 lady will strike up an affair with her prof.

But here's what we do know, courtesy of E! Online: Eureka star Niall Matter has been cast as a sexy 'n' suave prof at CU — and his character makes it clear to one of the girls that he wants to take their relationship outside the classroom.

Let the reading, writing, and romancing begin!

Source: E! Online