It seems that she’s been on TV forever. Ed and Boston Legal gave her steady employment, and then Modern Family made her a TV superstar. Before that, back when she was 25 and virtually unknown, she had a starring role opposite Adam Sandler in Happy Gilmore. She wasn’t naked there, but she was sexy in these outfits.
She comes from a well educated clan. Julie majored in Italian Renaissance studies at Brown University. Her youngest sister did her undergraduate work at Stanford, got her M.D. from Harvard Medical School, and is currently a physician and a professor of medicine and infectious diseases.
To my knowledge Julie has never done any film or TV nudity, but when she was in her early 30s (in 2003) she posed for a rear nude for Allure magazine.