After college he started modeling, first in Paris and then with star status in Milan in the late 1990s for Guess?, Tommy Hilfiger and Hugo Boss, among others.

[2] He appeared on Beverly Hills, 90210 in 1997, playing Rob Andrews, a love interest of character Valerie (Tiffani-Amber Thiessen).

[3] His most prominent role to date was on Sex and the City, where he was a recurring member of the show's cast in its final season as waiter turned emerging young actor Jerry "Smith" Jerrod, the one man whose sincerity got to Samantha.

[8] After appearing on The WB's supernatural drama Charmed, where he played the recurring role of Dex Lawson, a love interest (and brief husband) of Phoebe Halliwell (Alyssa Milano), it was announced on December 5, 2006, that he would guest-star on episodes of Brothers & Sisters as a possible love interest to Matthew Rhys' character Kevin Walker.

He signed on to do seven episodes to play Chad Barry, a closeted gay soap opera actor who finds it difficult trying to develop a relationship with Kevin while keeping his sexuality secret from the Hollywood press.

Lewis appears and is highlighted on the cover in the limited-edition coffee table book About Face, shot by celebrity photographer John Russo and published by Pixie Press Worldwide.