His agent chose his middle name Astin to be his stage name when he was fifteen.
(September 10, 2016) Married his girlfriend of 3 years, Anna Camp, in an outdoor ceremony on the central California coast, following a 8-month-long engagement.
He is of Russian Jewish and Polish Jewish descent.
Before becoming famous, Skylar worked in the deli of a natural foods store called Back To Earth in New City, New York.
(April 19, 2019) His wife, Anna Camp, filed for divorce.
He has a sister named Brielle and two brothers named Milan and Jace.