Jenna Ortega as Harley Diaz, the middle of seven children and a young engineering prodigy. She is the central character in the series and views herself as an inventor. Some of her known inventions are the Conveyor Belt Table, the Slushinator, the Skate Kite, the Pick - Me - Up, and a snow machine. In "Stuck in the Sweet Seat '', it is revealed it is her 13th birthday. A significant feature is that she tends to break the fourth wall to tell the viewers something about the situation. Ronni Hawk as Rachel Diaz (seasons 1 -- 2; special guest, season 3), the oldest of the seven children and Harley 's vain older sister. In "Stuck with No Rules '', it is revealed that she is 16. In the third season episode "Stuck with Rachel 's Secret '', Rachel leaves the family to attend college in Paris, France, while interning at a fashion company there. She returns in the series finale to help the family celebrate Harley 's quinceañera. Isaak Presley as Ethan Diaz, Harley 's oldest brother and her partner - in - crime; she refers to him as her best friend in the family. He is an aspiring musician and filmmaker. In "Stuck in the Sweet Seat '', it is implied that he is the third oldest of the seven, behind Rachel and Georgie. Ariana Greenblatt as Daphne Diaz, the youngest of the seven children and Harley 's younger sister. She enjoys having tea time with her dolls and sleeps in her indoor dollhouse. In "Stuck with No Rules '', it is revealed that Daphne can easily retaliate against anyone who takes things from her without getting her approval first. Kayla Maisonet as Georgie Diaz, one of Harley 's older sisters and the second oldest of the seven as implied in "Stuck in the Sweet Seat ''. She is a basketball player at her school and does an assortment of other sports. Nicolas Bechtel as Lewie Diaz, one of Harley 's two younger brothers and Beast 's twin. It is revealed in "Stuck in the Beast - Day Party '' that Lewie is older than Beast by five minutes. Malachi Barton as Beast Diaz, one of Harley 's two younger brothers and Lewie 's twin. Cerina Vincent as Suzy Diaz, Harley 's quirky mother who rarely has any alone time from her children and tends to spend it in the most unlikely places. Suzy is the one who usually punishes the kids from grounding them to even putting them on lockdown for higher violations. Joe Nieves as Tom Diaz, Harley 's father who is the proprietor of a marina store called "Tom 's Bait and Bite '' which sells camping and fishing equipment. While he is a loving and caring father, he does tend to get upset when his kids let him down in any way.
who plays the girl in stuck in the middle
Jenna Ortega