Kim Kardashian posted several new family photos of her 2-year-old daughter, North West, staring down the camera in the photo booth at Kylie and Kendall's graduation party -- see all the funny pics here! Credit: Courtesy of Kim Kardashian/Instagram

Aww, that is some serious stern right there! Kim Kardashian posted several new family photos on Friday, July 24, of her 2-year-old daughter, North West, staring down the camera in the photo booth at Kylie and Kendall Jenner's graduation party.

"My family," the pregnant reality star, 34, wrote, alongside a snap of her frowning daughter wedged in between her famous mom and dad Kanye West. The "All Day" rapper (surprise!) smiles in the sweet photo and Kardashian gazes at the camera with her trademark pout. The upper left-hand corner includes an inscription commemorating the momentous occasion, which reads: "Congratulations Kendall & Kylie, Class 2014 & 2015."

Kardashian shared several additional pics of Nori hanging out in the booth, another time with grandma "lovey" Kris Jenner and great-grandmom Mary Jo Campbell. "4 generations!!!!" Kardashian captioned one snap. "I love having my grandma here to celebrate these moments! My daughter is so lucky to have her great grand mother here!!! #Family."

4 generations!!!!

A photo posted by Kim Kardashian West (@kimkardashian) on Jul 24, 2015 at 7:34am PDT

I love having my grandma here to celebrate these moments! My daughter is so lucky to have her great grand mother here!!! #Family

A photo posted by Kim Kardashian West (@kimkardashian) on Jul 24, 2015 at 7:51am PDT

The last shot features Kardashian, Kris, and Campbell all doting on little Nori, who wears a mischievous expression. The reality star explained her daughter's look and wrote, "LOL at North sneaking m&m's between takes!" Soon, North will become a big sister to a younger brother, as was revealed exclusively by Us last month and confirmed by Kardashian herself in a Father's Day message.

LOL at North sneaking m&m's between takes!

A photo posted by Kim Kardashian West (@kimkardashian) on Jul 24, 2015 at 7:54am PDT

Kardashian also posted two PDA snaps with her husband. "My love," she wrote alongside one of the pair puckering up in private, followed by another pic of the couple laughing. "LOL," she wrote.

My love ??

A photo posted by Kim Kardashian West (@kimkardashian) on Jul 24, 2015 at 8:31am PDT

LOL ????

A photo posted by Kim Kardashian West (@kimkardashian) on Jul 24, 2015 at 8:33am PDT

While Nori was the clear star of the photo-booth pics, the focus of the party was on Kardashian's younger half-sisters, Kendall and Kylie. The star-studded surprise bash, which was organized by Kris Jenner and hosted by Ryan Seacrest, was attended by Kardashian family members and close family friends such as Tyga and Gigi Hadid.

Kylie also celebrated the occasion by proudly showing off her diploma from Laurel Springs High School. Meanwhile, Kylie's big sister Khloe twerked for the graduates in another video. "I love my mom for doing this. Thank you for making this experience as normal as possible for me," Kylie wrote to her mom. "Yay, I graduated :)."

Can't get enough of Us? Sign up now for the Us Weekly newsletter packed with the latest celeb news, hot pics, and more!