Nick Offerman and Paula Pell

The third Tammy in Ron Swanson's life has taken form: Saturday Night Live veteran Paula Pell has been cast as Parks and Recreation's Mama Swanson -- or Tammy, Ground Zero if you like.

Mama Swanson will be introduced early on in Season 4 along with Ron's never-before-seen, super scary first wife Tammy 1, who will be played by Patricia Clarkson.

Parks and Recreation scoop: Get ready for Mama Swanson and the return of Jean-Ralphio!

Series executive producer Mike Schur told TVGuide.com that Ron's mom is "no shrinking violet," and a character breakdown for the role describes her as "a no-nonsense, patriotic, salt-of-the-earth farm woman."

Insiders say Ron (Nick Offerman) may be in for a Tammy tornado when all three Tammys gather in the same episode. Megan Mullally will reprise her role as the super-frisky Tammy 2.

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Pell has been a writer on SNL since 1995, serving as head writer for two seasons alongside Seth Meyers and Andrew Steele, and often appearing as an audience member during sketches. She's also written episodes of 30 Rock and guest-starred as Pete's wife Paula Hornberger. She recently sold a feature pitch with Tina Fey to Universal for a comedy based on Pell's childhood diaries.

The fourth season of Parks and Recreation premieres Thursday, Sept. 22 at 8:30/7:30c on NBC.