Born in Kassel, Lars-Oliver Rühl began his singing career at first in rock and jazz scene. At the same time, he successfully completed teaching position studies in the subjects of the German language and literature at the University of Kassel. Furthermore he attended several classes on lied interpretation by Ulrich Eisenlohr. Upon passing the vocal exam within the teaching position studies, Rühl ended those studies and began his advanced education in musical phonation with Staatstheater Kassel's longtime alto Margarete Ast. In 1995, he was employed by the Staatstheater Kassel. He participated in opera, operetta and musical plays in numerous leading parts. During that time, he continued his vocal education with tenor Alexander Stevenson. Through Christian Elsner, Siegfried Jerusalem, Erik Halfvarsson and Phillip Ens, Rühl gained further encouragement.
After Michael Schulz hired him in 2008 as lyric tenor at the Musictheater im Revier Gelsenkirchen, Rühl performed in Mozart's The Abducation from Seraglio as Belmonte and in The Magic Flute as Tamino. In addition, he was seen as Prinz Sandor Boris in Kálmáns The Duchees of Chicago, the title role in L. Bernsteins Candide and as Fenton in the Merry Wives of Windsor.
In 2010, Rühl debuted as Earl of Essex in Brittens Gloriana, directed by Elisabeth Stöppler. Other important parts for Rühl have been Prinz in The love for the three Oranges and Froh in Rheingold. For his work in the season 2009.10 Lars-Oliver Rühl was awarded the Audience Award of the Theatergemeinde Gelsenkirchen.
Once his voice developed into the subcategory spint, Rühl gave impressive performance the following years in parts of Arthur in Albeniz' Merlin, Prince in Dvorak's Rusalka and Narraboth in R. Strauss' Salome, as well as Sergej in Lady Macbeth of the Mtsensk District (Schostakowitsch). Moreover, his debut as Steva (Jenufa) and Erik in R. Wagner's Flying Dutchman were especially successfull.
As a freelancer he'll start the season 2016.17 at Staatstheater Mainz with Flavio (Norma, Bellini) and will give his debut as Hans Schwalb in Mathis the painter by Paul Hindemith.
2013 and 2016, Lars-Oliver Rühl guested as Moser (Mastersingers of Nuremberg) at the Wagner in Budapest Opera Festival, under the musical direction of Adám Fischer.