Júlia Lemmertz Dias (born March 18, 1963) is a Brazilian television, film and stage actress.

Júlia was born in Porto Alegre, Rio Grande do Sul, to actors Lineu Dias and Lílian Lemmertz.

Her career started when she was a child, and since then, Lemmertz has starred in over 40 soap operas.

Lemmertz was married to Álvaro Osório, a Rede Globo executive, from 1986 to 1990, with whom she had a daughter, Luiza (born 1987).

While filming Guerra Sem Fim (1993), Lemmertz began a relationship with actor Alexandre Borges.