"Probably on a three-way call where I secretly listened to my best friend talk to her boyfriend," Glaser captioned this photo of her freshman year self.
"Eleven years ago with a girl I met on MySpace," Nikki Glaser captioned this Throwback Thursday pic of her and fellow comedian Amy Schumer.
To celebrate Easter, Glaser shared an adorable childhood photo of herself, captioned, "One of the best mornings of my life I think."
Glaser certainly likes to celebrate holidays with old family photos, sharing this one of her and her sister, Lauren, captioned, "Happy 4th from me and my lil' sis in 1992."
While Glaser does a great Jennifer Aniston impression, her impression of her sister's baby is even better.
"I love sharing these special moments with my niece and nephew that they'll never remember," Glaser jokingly captioned a pic of her niece and nephew.
All dressed in late 80s, early 90s garb, Glaser captioned this Instagram post, "I was cool once!"
Glaser will post a throwback pic for any occasion, using this one to encourage her fans to vote for her on Dancing With the Stars season 27 in 2018. "Please watch this child dance live on national television this Monday on @dancingabc," she joked. "She is so scared and needs your nonjudgmental support."
Sharing her 2002 senior year prom pic with fans, she also recalled the story of how her "very popular" date and his friends avoided her all night. Poor Nikki!
Glaser shared a sweet picture in celebration of her mother, Julie's birthday, saying, "Happy birthday, mom. I love you! Thank you for teaching me about farm animals!"
Glaser had a knack for comedy early on, photobombing her sleeping dad, EJ, in this hilarious family photo.
A nice family outing was the opposite for Glaser, captioning this funny photo, "Mom, thank you for always comforting me when animals are being abused nearby."
Everyone still relies on their parents as adults, as Glaser needed their help to assemble some furniture while living with them during the COVID-19 pandemic.
Long before adopting her current pup, Luigi, Glaser grew up with her childhood dog Speedo.
Now the host of The Nikki Glaser Podcast, the comedian had an interest in podcasting from a young age, captioning this childhood photo, "I have always loved podcasts."
Though Glaser claims she was "mediocre at field hockey," she and her friends were always "total pros at talkin s--t."
Sharing another field hockey throwback pic on Instagram, Glaser and her friends posed for a Charlie's Angels-inspired pic in their sports gear.