[1] A student of actress Elsa Merlini, Valeri began her professional acting career in 1948, working on stage with fellow actors such as Gino Cervi, Ivo Garrani, Paolo Ferrari, Alberto Lupo, Alberto Lionello and Enrico Maria Salerno.

[2] In 1958, Valeri joined the Compagnia Attori Associati, where she met Garrani and Salerno; with the latter she established a strong artistic and personal relationship.

A tireless actress, from the mid 1990s, Valeri continued to perform on theatrical stages with dedication, mostly in light comedies.

[3] Valeri had a very short experience as a movie actress, especially due to the fact of being involved in several plays on stage.

[4][5] On the small screen, Valeri is remembered mainly for the one role that made her very popular in the 1960s: Mrs. Stoppani, mother of the restless Giannino Stoppani (portrayed by Rita Pavone) in the 1964 short series Il giornalino di Gian Burrasca, directed by Lina Wertmüller.