Brett's on-screen career began with a commercial for "Skipper's Seafood 'N Chowder House" fish-n-chips, where only his hands appeared. He soon transitioned to Zurich, Switzerland, introducing the "Fresh Start Laundry Detergent" commercial campaign to German television audiences.
After studying at the Rational Theatre in Munich, Brett amassed over seventy-five commercials, including "Kim Top Line", "Co-op", and "Gold Market", earning numerous awards in Europe. He then relocated to Los Angeles, where he received training from the renowned Harry Mastrogeorge.
Brett's acting career flourished, with recurring roles on "Sunset Beach" as Atty. Joshua Sloane and on "The Bold And The Beautiful" as the popular Dr. Jay Garvin. He also played Colonel James Mallory, USMC, in the feature film "Operation Safeguard", which was filmed exclusively for the United States military in the Middle East.
Brett's notable performances include a nude scene in the series "Red Shoe Diaries: Laundrymat" and the role of Dan Wisner in the Starz original series "Party Down". He also appeared as Robert Jones on the FX Channel's top-rated show "The Shield" and as Frederick Albert Cook, the legendary explorer, in the Discovery Channel's "Race To The Poles".
Brett is renowned for his poignant and accurate portrayals of President John F. Kennedy, having played the role in four films: Watchmen (2009),Transformers: Dark of the Moon (2011),Kill the Dictator (2013),and Parkland (2013). His performance in Parkland earned praise from Ethel Kennedy herself.
In addition to his acting career, Brett is a triple threat, having written, produced, and starred in his multiple-award-winning film "Ray Bradbury's Kaleidoscope", which inspired the Oscar-nominated film "Gravity". He is currently in pre-production for his next feature film, in which he will star as "The Champion".
Brett is also dedicated to philanthropy, serving as a trustee of the Olive Crest Abused Children's Foundation, a supporter of Hollywood Heart, the Boys and Girls Clubs of Santa Monica, and the UNICEF Chinese Children's Foundation. He believes in the importance of hard work and following one's dreams, saying, "Hard work and following your dreams can take you anywhere. The person who says it can't be done shouldn't interrupt the person doing it."