Mark Feuerstein got his break-through on television as a recurring character on the daytime soap opera Loving. Most of the people in his family are lawyers. He was a high school state championship wrestler. He enjoys mountain-biking, wrestling, dancing (hip-hop to salsa) and jogging.

He got the nickname "Chaplin" on the set of Giving It Up because of his uncanny knack of physical comedy. He even had a physical slapstick back-and-forth with Mel Gibson a year later on the set of What Women Want.
He was named "It Phoenix" by the June 30th 2000 issue of Entertainment Weekly due to his rise from the ashes after the demise of his NBC sitcom Conrad Bloom. Brother is a successful real estate attorney. Graduated from Princeton University class of 1993. Was named one of People's 50 Most Beautiful People in 2003. Wrote an 193-page school thesis: "Every Man is A King: An Actor's Journal." When director Nancy Meyers was casting What Women Want her daughter recognized Feuerstein from Practical Magic and other endeavors. She insisted that her mother cast him. Won a full scholarship to the London School of Dramatic Arts and studied with the top clown teacher at Ecole Phillipe Gaulier in France. Was a wrestler in High School and won the State Championship. Was given the nickname of "Chaplin" on the set of Giving It Up for his uncanny knack with physical slapstick by the writer/director Christopher Kublan. Was dubbed by wags as "Murderer of a thousand sit-coms" and "sit-com kryptonite" due to his lack of success as a lead in Conrad Bloom, The Heart Department, and Good Morning, Miami. The underrated cult-hit Fired Up was canceled after a little over a season and a half. The disappointing Conrad Bloom lasted a little less than a whole season. Good Morning, Miami marked his first successful TV lead. Most of the people in his family are lawyers. Is a constant supporter and activist for AIDS charities. Most favorite role was the weaselly junior suit in Albert Brooks' The Muse Most hated role was the short-term sex partner who Cynthia Nixon had to fake orgasms for on Sex and the City. Was on a panel of judges for a film festival sponsored by Princeton in Hollywood. Is often photographed either shirtless or wearing a bow-tie. Top three favorite movies are Annie Hall, The Godfather, and Rocky. He has played executives in an advertising company dealing with women issues in Conrad Bloom, Giving It Up, and What Women Want. Sit-com switch-hitter whose best success lies in guest-spots and recurring roles (Caroline in the City, Ally McBeal, The West Wing, and Once and Again) and has struck out as a regular (Fired Up, Conrad Bloom, and Good Morning, Miami). Claims his greatest indulgence is bacon cheeseburgers and gin and tonics. Appeared with Lauren Graham in both Caroline in the City as the lead's love interests and Conrad Bloom as the stars.