Mackenzie Lynne Dern was born March 24, 1993 is an American Brazilian jiu-jitsu practitioner and mixed martial artist. She is a former world No. 1 ranked IBJJF competitor, currently ranked 6th among the female divisions. She is an ADCC and no gi BJJ (black belt) World Champion.
Dern was born in Phoenix, Arizona, the daughter of Wellington “Megaton” Dias, a highly decorated grappling competitor himself.
Dern began training by age 3 and practicing with her father and stepmother who is also a black belt, Luciana Tavares. Mackenzie started competing at a young age, and began competing in the adult divisions at 14 years old. She has won a world championship in every belt level as she progressed to black belt rank, which was awarded to her by her father in December 2012, three months prior to her 20th birthday. She graduated from Ironwood High School in Glendale, Arizona.
Dern fought under Legacy Fighting Alliance with a record of 4-0 prior to signing with Invicta Fighting Championship(Invicta) in November 2017
Dern made her Invicta debut on December 8, 2017, at Invicta FC 26: Maia vs. Niedzwiedz against Kaline Medeiros. She won the fight via an armbar in round three.
Dern is scheduled to make her promotional debut against Ashley Yoder on March 3, 2018, at UFC 222.