In 2013, shortly after graduation, Adeele Sepp began an engagement as an actress at the Ugala theatre in Viljandi, where she is still currently employed. She made her stage debut at the theatre while still a student in a production of Viktor Pelevin's 1993 allegorical storyThe Yellow Arrow in 2011. Since joining the Ugala, Sepp has appeared in roles in productions of such varied international authors and playwrights as: George Stiles, Fyodor Dostoyevsky, Abi Morgan, Carlo Goldoni, Rainer Werner Fassbinder, Ken Ludwig, and L. Frank Baum, among others. Roles at the Ugala in works by Estonian authors and playwrights include those of: Tõnu Õnnepalu, Martin Algus, Oskar Luts, and Anton Hansen Tammsaare. Sepp has also appeared in productions at the Teatri Kodu, the Vanemuine theatre, and the MTÜ Tuulekell.
Film
In 2010, Adeele Sepp made her feature film debut in a starring role as Elen in the Richard Meitern and Martin Liira directed student film musical-romance Tudengimuusikal about a teenager who moves from her father's home in Tallinn to the student dormitories in Tartu to study economics at university. The film revolves around Elen's newfound liberation from her father, new friendships, and the attentions of two very different young men. The film is interspersed with musical and dance numbers. Tudengimuusikal would be Estonia's most expensive student film. In 2018, she appeared in a supporting role as Katrin in the Liina Triškina-Vanhatalo-directed drama Võta või jäta for Allfilm.
Television
Sepp made her television debut as Saara on an episode of the Kanal 2 crime series Kelgukoerad in 2010. She is possibly best recalled, however, as the character Kirke Klein on the popular TV3 comedy-crime series Kättemaksukontor; a role she played from 2013 until 2015. In 2016, Sepp was a contestant on TV3's Su nägu kõlab tuttavalt, the Estonian version of Your FaceSounds Familiar, an interactive reality television franchise series where celebrity contestants impersonate singers. Sepp's impersonations included Renārs Kaupers of Brainstorm, Brigitte Bardot, the Spice Girls, David Bowie, Jennifer Hudson, and Anne Veski, among others. She finished in third place at series end.
Personal life
Adeele Sepp currently resides in Viljandi while she is engaged at the Ugala theatre. She frequently commutes to Tallinn for other work. On 3 August 2019, Sepp married Jaan Jaago, guitarist and vocalist of the Estonian folk bandCurly Strings. The couple have a daughter, Salmeli, born in October 2018.