Tina Fey apparently isn’t thrilled by what’s under her bossypants.

In an interview with “Today” published Thursday, the “Mean Girls” creator got pretty candid about aging.

Fey, 56, told the outlet that she wasn’t really prepared for the realities of entering her 50s until, well, she did. The “Saturday Night Live” alum emphasized some of the surprising changes by describing them with a two-word term: “reverse puberty.”

“I feel like it’s a reverse puberty in a way. It’s like your body starts to change and be disgusting in new ways,” Fey told the outlet with a laugh. “When you’re 12 or 13, you’re like, ‘Why am I so oily?’ And now you’re like, ‘Why am I so papery?’” she added.

Fey said that she finds some solace with her fellow writers in the “Four Seasons” writers’ room.

“We’re all pretty much the same age,” she said of the creative team behind her Netflix series.

“Almost all of us have known each other a super long time, and so all the writers are really good about sharing their own things,” she added before revealing that some of their aging-related experiences have been used in the show.

“Then sometimes our spouses are like, ‘Is that me?’ And then we’ll usually just be like, ‘No, no.’ We’ll just lie and say, ‘That’s so and so,’” Fey said.

In an interview with The Hollywood Reporter last year, Fey said she now struggles to stay up past midnight, which proved quite a challenge for her at the “SNL50” afterparty last year.

“I’ve never been able to get over the fact that I left the 40th afterparty before Prince’s surprise set,” Fey told THR. “So the whole week leading up to the 50th, I drank water, I went to bed early, I saved it all up. But when I got to the afterparty, I couldn’t find any of my friends, and obviously, there was no chance of Prince, so I thought, ‘Actually, I’m out.’”

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