Born and raised in Istanbul, Didem Ellialtı is a graduate of Yeditepe University Art Management and New York Actor Studio Lee Strasberg Theater and Film Institute.

After doing internships at Radikal Sanat and Cnnturk during his university education, she was the Publishing Editor of Fashiontv and Fashiontv Magazine by Harvey Nichols for 6 years. She made interviews with world stars in New York, Milan, Paris and Istanbul in many parts of the world in the TV program called 'f people', which she produced and presented on FashionTV. After acting in the movies ‘Melekler ve Kumarbazlar’, Being Italian with Signora Enrica, she studied acting for 2 years at the New York Actor STudio Lee Strasberg Theater Film Institute, where actors such as Al Pacino, Marilyn Monroe and Angelina Jolie studied.

Afterwards, she studied different acting techniques by taking 6 months of advanced acting training at Stella Adler Acting Studio. She played the leading role in the theater plays "The Owl and the pussycat" and "Summer and Smoke" written by Tennessa Williams at the Marilyn Monroe Theater in New York. She acted in many original screenplays and short film adaptations of Broadway plays in New York.

Didem Ellialtı, who currently lives in Istanbul – Ny, continues to Susan Batson Acting Studio while she is in Ny... She worked with Ivana Chubbuck’s method and taking advance scene study classes which this techniques required.

She appeared as a guest actor in the TV series 'Intikam', 'Canım İçi', 'That life is mine'. She played the lead character named Lucy in the theater play Dracula at the Akla Kara Theatre. Most recently, the actress has acted in the movies "Kumbara", "Bir Güzel Hikaye" ‘Karanlıkta Islık Çalanlar’ ‘Şüphe’ ‘Ben bu boşluğu nasıl’ and "Kara". And lastly ‘Yurt’ as a co producer and actor. ‘Yurt’ had its world premiere at the Venice Film Festival and continues its world tour which she will be in it.

Her mom Ferda Ekberi is a well known fashion and industrial designer. Her father Aydoğan Ellialtı was a business man and very good taste in fashion. He is very stylish in a masculen way. All her inspiration about fashion is coming from them. He has one year younger brother İhsan Ellialtı working at Turkish Airlines as a purser and he is into off road.

The actress also owns a fashion pr showroom called Di fashionbranding, which does celebrity styling and fashion consulting in Nişantaşı. She is a costume supervizor of ‘Kara’ and ‘Yurt ‘ movies. She also plays an active role in the field of fashion with her own design brand called Diproject, with leather and knitwear collections.