During her career, which has spanned more than 60 years to date, Seela Sella has had roles in productions at the Finnish National Theatre, the TTT-Theatre, the Tampere Comedy Theatre, etc.

Sella has worked with Finnish director Timo Koivusalo on a number of films such as Sibelius (2003) and Kalteva torni (2006).

Sella has also done voice-overs for the Finnish versions of such animated movies as A Bug's Life and The Emperor's New Groove.

Sella received an award for her work from the Alfred Kordelin Foundation in 2000.

She converted to Judaism when she married the Finnish Jew Elis Sella.