The actress, 32, will play Dr. Nina Greene, an intelligent nephrologist (aka kidney doctor) who may possibly also be a former child star. Garcia will enter the scene as a doctor treating Jack O'Malley, played by returning guest star Tom Cavanaugh.
Garcia broke the news about her casting late Tuesday, tweeting: "Tomorrow I have the honor of starting my work on @RoyalPains_USA! I'm a huge fan of the show and excited they asked me to hang out with them for a bit!"
Royal Pains returns for the second half of Season 3 in early 2012.
Are you excited to see Garcia play doctor on Royal Pains?