Kaitlyn Rochelle Dever (/ˈdiːvər/; born December 21, 1996) is an American actress. She became known for her roles in series such as Justified (2011–2015), Last Man Standing (2011–2021), Unbelievable (2019), and Dopesick (2021). She earned nominations for Unbelievable and Dopesick and a Primetime Emmy Award nomination for the latter.

Dever has had supporting roles in the films  Short Term 12 (2013), Detroit (2017), Beautiful Boy (2018), Dear Evan Hansen (2021), and Ticket to Paradise (2022). Her leading film roles include Booksmart (2019), Rosaline (2022), and No One Will Save You (2023).