Len Rivera is the father of Alicia Rivera. His real name is Len Rivers. He pretended to be Spanish so that he could marry Alicia's mother, Nadia. It is stated in the series that he is a lawyer. He is only mentioned and seen a few times throughout the series. One of his appearances is made in Charmed and Dangerous: The Rise of the Pretty Committee. Another was Revenge of the Wannabes.
Len is married to Nadia Rivera.