Adrian Grenier was initially cast to play the lead role of Harvey Dent/Two-Face in the blockbuster film "The Dark Knight," but had to drop out due to scheduling conflicts.

Grenier has a passion for documentary filmmaking and has directed several documentaries, including "Teenage Paparazzo," which explores the relationship between celebrities and the media. 

Before he became an actor, Grenier was a musician and even played drums in a band called "Kid Friendly" in his early twenties.

Grenier's breakthrough role came in 1998 when he played the character of Chad in the movie "Next Stop Wonderland."

Grenier played a small role in the film "Drive Me Crazy" but was uncredited.

Grenier starred in a short film called "Across the Hall" which was later adapted into a feature film by the same name starring Mike Vogel.

Grenier played the role of Vincent Chase in the hit HBO series "Entourage" for eight seasons, which earned him three Emmy nominations.

Grenier's character in "Entourage" was inspired by Mark Wahlberg's experiences as a Hollywood actor.

Grenier played the role of James in the movie "Cecil B. DeMented," which was directed by the legendary director John Waters.

Grenier starred in the movie "The Devil Wears Prada" alongside Meryl Streep and Anne Hathaway.

Grenier has made several guest appearances on popular TV shows such as "90210," "Law & Order," and "Arrested Development."

Grenier played the role of Isaac in the independent film "Goodbye World," which tells the story of a group of friends who are forced to live off the grid after a global cyber attack.