Gelula began her acting career at the age of ten as an extra in the
M. Night Shyamalan film
Lady in the Water, which she later revealed neither she nor her parents ever viewed. Two years later, in the sixth grade, she found a manager. Before moving to Los Angeles, her agent in New York got her an audition for the role of Jean Fordham in an
Arden Theatre Company production of
August: Osage County, directed by
Terry Nolen, which she ended up starring in. She recalls remembering originally trying to turn down the part, but later realizing that she was very interested in it. Gelula has also played Gretchen Doyle on
Jennifer Falls, Ford on
Chasing Life, and Xanthippe on
Unbreakable Kimmy Schmidt. When Gelula initially auditioned for the role of Xanthippe on
Unbreakable Kimmy Schmidt, she was in Los Angeles, but casting was only happening in New York City. She gave the crew of the show an audition tape, and received a call one month later that they were interested in her for the part. The crew asked her to do a table read with the cast before she was given the part, and she eventually received the role. She claims she does not know why the character of Xanthippe was given the name she was given. In 2016, Gelula made her film debut as the lead actress with romantic drama film
First Girl I Loved, directed by Kerem Sanga. The film premiered at the 2016
Sundance Film Festival and won the audience award for Best Of NEXT. Gelula's performance in the film as Anne received rave reviews from various critics. That same year she had recurring roles in shows such as the teen sitcom
Filthy Preppy Teens and
Hulu's comedy-drama
Casual. She continued to appear in numerous independent films including
Flower (2017),
Support the Girls (2018), and
Her Smell (2018). In 2020, Dylan created a podcast with
Broti Gupta called
Lecture Hall, with guests including
Ayo Edebiri and
Rachel Sennott. She acted in
Cooper Raiff's directorial film debut
Shithouse (2020) where she played the romantic lead opposite Raiff. The film won the Grand Jury Prize for Best Narrative Feature at the
SXSW Festival. In 2023 she had a supporting role as Molly, a talent agent's assistant, in
Kristoffer Borgli's psychological dark comedy
Dream Scenario starring
Nicolas Cage. ==Filmography==