Un Certain Regard is a section of the Cannes Film Festival's official selection. It is run at the salle Debussy, parallel to the competition for the Palme d'Or. This section was introduced in 1978 by Gilles Jacob. From Wikipedia
The feature debut, starring Alexander Skarsgård and Harry Melling, received a seven-minute standing ovation for its bold exploration of dom/sub dynamics and queer intimacy.