A Lua Me Disse (English: Once in a Blue Moon) is a 2005 Brazilian telenovela created by Miguel Falabella and Maria Carmem Barbosa, and starring Adriana Esteves and Wagner Moura.

Heloísa (Adriana Esteves) is a baby-sitter hired to work at Regina's mansion.

There, she meets Ricardo and Gustavo (Wagner Moura), who both fall in love with her.

Heloísa and Ricardo have an affair and she gets pregnant, but his spiteful mother Ester (Zezé Polessa) forbids him to marry the nanny.

After a heated discussion with his mother, Ricardo drives off in his car and dies in a tragic accident.