[citation needed] Bergin is perhaps best known as Mark Wahlberg's successor in Calvin Klein's racy series of black-and-white underwear ads.

In addition to his high-profile role as the "spokesbody" for Calvin Klein, Bergin has walked the runways of New York City, Paris and Milan for Sonia Rykiel, Valentino, Calvin Klein, Gianfranco Ferré, Giorgio Armani, Yves Saint Laurent and Donna Karan and was the exclusive model for Claiborne for Men, a division of Liz Claiborne, Inc., for over three years.

He has also appeared in commercials and print advertisements for Kellogg's, Bacardi Rum, L'Oréal, Maybelline, Coty, Valentino, Perry Ellis, and Liz Claiborne.

[1] In the early 1990s, Bergin met Carolyn Bessette-Kennedy, a Calvin Klein publicist, whom he dated seriously, despite her burgeoning relationship with John F. Kennedy, Jr., whom she later married in September 1996.

[4] On September 24, 2004, Bergin married makeup artist Joy Tilk with whom he has two children (Jesse b. October 8, 2000; Alana b. February 16, 2004).