Shawkat reprises her role as Maeby Funke in the fourth season, which she revealed will feature the continuation of Maeby's awkward romance with cousin George Michael (Michael Cera).
"Me and Mike Cera were like, you know, 15, 16 when we were shooting it, so a lot of my 16-year-old insecurities are coming back, but I've lived a whole life, like I know how to be comfortable, so I'm trying to figure that out," she told MTV News.
She then joked: "It's really cool, like we've been shooting for three weeks and we're still like, 'This is weird, right? This is weird'."
Shawkat also revealed that Arrested Development creator Mitch Hurwitz recently ordered the cast not to release spoilers for the new episodes.
"I feel like such a douchebag, but I've been like, they sent emails that are like, 'Please do not release any content'. Jason Bateman messed up a couple of times, so I'm not going to be that girl," she teased.
Mae Whitman, Liza Minnelli, Judy Greer, Scott Baio and Henry Winkler are among the Arrested Development guest stars for season four.
John Slattery, Terry Crews and Isla Fisher have also joined the cast.
Arrested Development will stream on Netflix in the US and UK in 2013.
Watch a clip from Arrested Development below: