Parks and Recreation kicked off its sixth season with a whirlwind wedding. Diane (Lucy Lawless) got married to Ron Swanson! TV Guide wrote:
The premiere picked up just moments after last year's finale, in which Diane (Lucy Lawless) went to Ron's office to break the news that she was pregnant. It takes Ron less than 20 seconds after finding out she's carrying his child before he asks her to be his wife. The proposal and impromptu wedding then happens within the first four minutes of the premiere, as the duo heads upstairs to get their marriage license and then tie the knot right there in the office.
Last season, Lawless signed on for a short guest stint as a potential love interest for Ron Swanson. Her character was meant to be the exact opposite of his past failed relationships with his various Tammys (Offerman's real-life wife Megan Mullally and Patricia Clarkson).
"The relationship was conceived with the idea that we've seen how Ron fails in his relationship choices. What if we put him in a situation he might succeed?" Offerman says. "He'd be given the chance to actually have a real relationship instead of these manic trysts with his assorted Tammys. We knew there was the potential for it to go somewhere, but at the time, we didn't know where it would be going."
and in another TV Guide article:
10. Best Quickie: In the opening moments of the new season of Parks and Recreation, Ron's girlfriend Diane (Lucy Lawless) reveals that she's pregnant, to which Ron responds not with shock or concern, but with an engagement ring (in a carved wooden box, natch). They decide to get married right then and there and drag Leslie and Amy up to the fourth floor for their quickie ceremony. Just as Ron and Diane are about to exchange "I do's," Diane tells the clerk her middle name is Tammy — the name of Ron's mom and two ex-wives — before she quickly assures him that she's kidding. Looks like Ron's truly met that special someone who truly completes him ... and we're not talking about that steak he had for dinner.