In Grey's Anatomy Series :
In real life:
Justin Chambers is an American actor and model born on July 11, 1970 in Springfield, Ohio (United States). He is known for his role as Alex Karev in the series Grey's Anatomy from 2005 to 2020.

Justin Chambers was born on July 11, 1970 in Springfield, Ohio. He is the son of Pam and John Chambers and has two sisters, Mia and Susan, and two brothers, John Jr. and Jason (his twin brother).
Age : old.
Attribution - Sources - licenses