He was born Theodoros Zoumpoulidis in Greece.
Alexander received a Bachelor of Arts degree in business science from Boston University, and then enrolled to study acting in New York City, New York, at the Circle in the Square Theatre School, a private drama school associated with the Circle in the Square Theatre and, as such, the only accredited school attached to a Broadway theatre. He first appeared in television series such as CSI: NY and Pushing Daisies, but his career took off in 2007 with the episode "Chuck vs. the sausages" of the television series Chuck, where he played the role of the Greek mafioso Demitrios Stavros.
In 2010 Alexander began working on a self-written project, "Love and Let Die". He was also working on other projects as a producer and writer.
Alexander enjoys martial arts and kick-boxing.
