Piret Kalda (born February 4, 1966) is an Estonian stage, television and film actress. Piret Kalda was born and raised in Tartu. She was one of three siblings. She attended schools in Tartu, graduating from Tartu No. 5 secondary school (now, Tartu Tamme Gymnasium). Following her graduation from secondary school, she enrolled at the Tallinn State Conservatory's Dramatic Arts Department (now, the Estonian Academy of Music and Theatre) in Tallinn, studying acting, and graduating in 1988. Her diploma production roles included Laurey Williams, in Richard Rodgers' Oklahoma!; Bianca, in William Shakespeare's The Taming of the Shrew; and Irina, in Anton Chekhov's Three Sisters.

In 1989, Piret Kalda married actor Priit Künnapas. The couple had three daughters: Laura-Helene, Amanda Hermiine, and Aurora Aleksandra. Künnapas died of brain cancer in 2013. Kalda currently resides in Tallinn.