Andy Bailey is the "manny" (male nanny) of Joe Pritchett. Not much is known of his past/personal life except that he grew up in Utah, has worked previously with kids, and has a girlfriend in the U.S coast guard named Beth. His father died of cancer when he was 14, as explained in "The Help". Andy becomes a quick friend to the whole Dunphy family, except Jay who considers him to be weird. It is shown that Andy has a lot of the same traits as Phil in the episode "Other People's Children". Andy and Haley quickly start a hate-then-love relationship which unwinds in "The Wedding". It is later revealed that he has feelings for Haley, after asking if Haley meant anyone in particular when she told him that he deserved better. In "The Cold" Haley and Andy share a kiss.
Andy is described as a gentleman, with similar interests to Phil Dunphy. He also has excellent comedic timing.