Graziadei was born in Germany. He returned to the United States at 11 years old. He began acting in Germany, on stage, at the age of 5 in a production of The King and I.While at The University of New Hampshire he also appeared in The Servant of Two Masters and History of the Devil. In 2004, he was cast as Daniel Romalotti, Phyllis Summers' son, in the CBS daytime soap opera The Young and the Restless. He is 14 years younger than the Actress who plays his mother on the show, Michelle Stafford. In 2013 he left from soap for career in primetime television. In 2005 and in 2006, he was nominated an Daytime Emmy Award for Outstanding Younger Actor in a Drama Series. In film, Graziadei starred in the films Boogeyman 2 (2007), Into the Blue 2: The Reef (2009), and The Outside (2009).
In August 2016, Graziadei reprised his portrayal of Daniel Romalotti on The Young and the Restless for a limited run, in celebration of the soap's 11,000th episode. He also landed recurring roles on the Audience mixed martial arts drama series Kingdom and the Amazon Video historical period drama series Good Girls Revolt.
