In 2003, Romeu Costa graduated in Acting-Direction at the theatre school, Escola Superior de Teatro e Cinema, in Lisbon. Since then he has been working with Portuguese most influential theatre companies and directors. 

In 2009 he was nominated for a Portuguese Golden Globe - Best Actor for his role in Mona Lisa Show, by Pedro Gil. And in 2018, he won the Sociedade Portuguesa de Autores´s Best Actor award for his role in Orphans, by Dennis Kelly.

Besides working as an actor and stage director, he has been developing artistic projects with non-actors and scientific researchers countrywide. 

Alongside Joana Lobo Antunes, he developed a Science Communication course at Nova University. This Doctoral School powers up Phd students communicating skills by revisiting theatre technics.

He is part of the Dramaturgy and Performing Techniques department at the Lisbon Circus School, Chapitô.