Harley's parents forget her birthday, so she devises a plan to use their guilt as a way to get the ultimate birthday gift.
- Jenna Ortega as Harley Diaz
- Ronni Hawk as Rachel Diaz
- Isaak Presley as Ethan Diaz
- Ariana Greenblatt as Daphne Diaz
- Kayla Maisonet as Georgie Diaz
- Nicolas Bechtel as Lewie Diaz
- Malachi Barton as Beast Diaz
- Cerina Vincent as Suzy Diaz
- Joe Nieves as Tom Diaz
- This is the first episode of the series to feature the show's theme song and opening sequence.
- This marks Stuck in the Middle the first Disney Channel Original Series to have the lowest views on its series premiere with 1.6 million viewers.
- Georgie is wrong about the date of National High Five Day. She states that it was a week prior to Harley's birthday, which is April 22nd, 2016. However, National High Five Day 2016 is on April 21st - only one day prior.
- International High Five Day isn't a real holiday, while National Sandwich Day is in November.
- Harley tries to find ways for her family to not remembers it's her birthday.
- Harley wants to use her guilt to get the sweet seat but learns she wouldn't get it until four years later.
- Daphne eats Harley's cake.
- April 22, 2016 (UK and Ireland)
- May 3, 2016 (Australia)
- June 10, 2016 (Spain, Portugal)
- July 11, 2016 (Israel)
- August 7, 2016 (Latin America, Brazil)
- September 4, 2016 (Hungary)
| To view the Stuck in the Sweet Seat gallery, click here.