Ty Keegan Simpkins (born August 6, 2001) is an American actor. His notable film credits include the supernatural horror Insidious (2011), its sequel Insidious: Chapter 2 (2013) and Jurassic World (2015). He is also known for his appearances in the Marvel Cinematic Universe as Harley Keener in Iron Man 3 (2013) and Avengers: Endgame (2019).
Marty McFly is Doc Brown's friend, a scientist who has built a time machine. As the two test the artifact, a fortuitous mistake brings Marty to 1955, the year his parents were in high school and had not yet met.
