At the age of 18, Maija-Liisa Peuhu got in to theater school. After finishing theater school, she moved to Hämeenlinna where she started acting in Hämeenlinna City Theater. From there she continued to Kemi City theater and eventually she ended up as a freelancer in Helsinki. After this she has acted in the Finnish Nationaltheater, Theater Jurkka, Moniminä from Jussi Parviainen and traveled with Tuula Nyman around Finland in the "Tiput Tyrkyllä" show.

Maija-Liisa is one of the original cast members in the hit TV series Salatut Elämät where she plays Ulla Taalasmaa.