WWE fans rejoice -- Tammy Sytch has stripped down to have sex on camera -- she signed her deal with Vivid Entertainment.

Sytch -- aka ex-diva Sunny -- tells TMZ she and Vivid honcho Steve Hirsch recently came to an agreement. Vivid's already running a teaser clip with, but we're told she'll be shooting new footage for the final release, which has a very Farrah Abraham-ish title -- "Sunny Side Up: In Through the Backdoor."

Tammy says Hirsch's original offer of $100k wasn't quite enough but she says once Vivid came back with something "much, much higher" ... she was down.

The only downside to her porn deal -- Sytch tells us she's taking her WWE Hall of Fame ring off the auction block. Somehow we think her hardcore fans would take that trade.

Read more:

http://www.tmz.com/2016/01/21/wwe-tammy-sytch-vivid-porn-deal/#ixzz3xvybBz82