By Christian Blauvelt
Updated August 24, 2012 at 07:15 PM EDT
Charles Sykes/AP

True Blood‘s fifth season has zipped by as quickly as one of its super-speedy vampires. So to temper your sadness over the fact that it’ll be another year until Bon Temps’ bloodsuckers–not to mention their drawled declarations of “Sookie!” and preternatural sex–grace your screen, Parks & Recreation‘s Retta is going to chat live with you on during the finale on Sunday at 9:00 p.m. ET.

Though she’s best known as “parks diva” Donna Meagle on the NBC hit, if you follow Retta on Twitter (@unfoRETTAble) you know she doesn’t just star on one of the funniest shows on TV. She also regularly serves up hilarious commentary about the many other shows she watches. Last month, Retta shared some, um, strong feelings about Joe Manganiello that eventually became a four-way Twitter lovefest with Yvette Nicole Brown, Octavia Spencer, and the True Blood werewolf himself. Actually, she calls him “Joey” because that’s how close they are.

Retta will add her commentary to the finale, dish about Joey, and maybe, if you ask nicely enough, she may even share a hint about what Donna will be up to in season five of Parks & Rec (debuting on Sept. 20). See you at 9:00 p.m. ET/6:00 p.m. PT on Sunday!

Click here to access Retta’s True Blood live chat

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Joe Manganiello’s #FourWay with Retta, Yvette Nicole Brown, and Octavia Spencer: Read it!

‘Parks and Recreation’: Retta dishes on Ginuwine’s guest star hopes, Donna’s big sacrifice