Tyler was born in Santa Monica, California and lives in the Los Angeles area. He is the son of Cyndi Garcia and actor John Posey. His heritage is Irish, English (on his father's side) & Mexican (on his mother's side). He developed an early interest in the art and began his acting career performing on stage with his actor/writer dad, John at the age of six. They later worked in TV and film together. Tyler has worked steadily in both TV and film since the age of eight. He is also a singer/songwriter, plays lead and bass and fronts the band "Lost in Kostko". Tyler has two siblings an older brother named Derek and a younger brother named Jesse. Tyler has a dog named Chica.He is also recognized for his portrayal of Adam Alvaro. on The CW's Jane the Virgin.
Posey's career begins on 2002 when he appeared on action film Collateral Damage as Mauro. And then, he appeared on 2002 romantic-comedy-drama film Maid in Manhattan as Ty Ventura.He also appeared in several films and T.V. series from 2003-2010. And in 2011 when he got his big break when he got the role of Scott McCall on MTV's Teen Wolf. He made a recurring role on Jane the Virgin. He appeared 7 episodes as Adam Alvaro, a comic book artist and Jane's first love.