The 36-year-old actor, best known for playing Damian in 2004 film 'Mean Girls', will appear in the upcoming second season of the gay comedy drama, according to The Hollywood Reporter.
He will appear in a multi-episode arc as Eddie, a new love interest for one of the show's main characters.
Russell Tovey, who has been promoted to series regular for the new season, posted a picture of the season two cast enjoying some free time in San Francisco, where the show is based.
Jonathan Groff, Murray Bartlett and Frankie Alvarez lead the cast of 'Looking', while Lauren Weedman and Raul Castillo have also been promoted to regulars.
'Looking' is expected to return to HBO in 2015.