Born in
Tuddal in 1943, Sletta made his stage debut at
Nationaltheatret in 1964. His next assignments were with
Riksteatret from 1965 to 1967, and with
Trøndelag Teater from 1967 to 1969. From 1969 he was appointed at
Det Norske Teatret. He made his film debut in 1967, in
Skouen's
Musikanter, and appeared in around thirty films or television series. In 1997 he received the
Theatre Critics Award from the
Norwegian Critics' Association, for his role "Mattis" in a theatre adaptation of
Vesaas' novel
Fuglane. He received Aksel Waldemar's Memorial Prize twice, in 2001 and 2007, for his contribution to the application of
Nynorsk language on stage. Playing the character "Tor" in the TV series
Berlinerpoplene (based on novels by
Anne B. Ragde), earned him the
Gullruten award in 2008. ==Personal life==