Greg is 6' (1.83 m).
Greg is a former model of Abercrombie & Fitch; he was a model before landing a role as a host in Disney show Z game.
Greg was a student in the Lawrence Woodmere Academy.
In 2005 he was a model for the deodorant brand Old Spice.
He was an extra in the 2004 Outback Steakhouse commercial, he can be seen eating meat in the background.
Greg is a poet.
He's a rap singer, his talent can be seen in the American Idol movie, From Justin to Kelly; where he performed a rap he wrote, named Brandon's Rap.
At age 13, Greg sang with the New York Opera at Lincoln Center in the boys chorus.
Greg plays guitar, alto-saxophone and sings in the New York punk band Grandma's Room.
Greg Siff: I have never been more happy than with a script in my hand, searching for truth.