According to a brand new promo for Lena Dunham’s hit HBO series, the girls of “Girls” are about to grow up.

“This season of ‘Girls’ is the girls making smarter choices,” Dunham says in the video, “and realizing that life is still hard.”

So what exactly do some of these smart choices look like? Hannah heads off to the Iowa Writers’ Workshop and Marnie tries to make a real go of her musical career. Along the way, the girls encounter guest stars Zachary Quinto, Gillian Jacobs, Danny Strong and — spoiler alert — Ana Gasteyer as Shoshanna’s mom! (Cady Heron would approve.)

“I was so incredibly excited to hear that I got to meet my parents this year,” Zosia Mamet, who plays Shosh, says in the video. “I sort of always just imagined that she, like, came out of a sea shell or a pea pod or something.”

The fourth season of “Girls” is set to air in 2015.