Reinert K. Olsen (born 10 July 1978), known professionally as Ray Kay, is a Norwegian director and photographer who is currently based in Los Angeles.

He is a music video and advertising director.

Ray Kay mostly directs music videos and has worked with artists such as Cher,[1] Britney Spears,[2] Lady Gaga,[3] Justin Bieber,[4] Jessie J, Nelly Furtado,[5] Beyoncé Knowles,[6] Destiny's Child,[7] Gloria Estefan,[8] Steven Tyler,[9] Enrique Iglesias,[10] Adam Lambert,[11] Cheryl Cole,[12] Alesha Dixon,[13] Diddy, Willow Smith,[14] Amerie,[15] Sean Paul, Christina Milian,[16] The-Dream,[17] Backstreet Boys, Melanie C, Ciara, Snoop Dogg, and Ghostface.

[18] He also photographs fashion stills and album covers, and has directed advertisements for brands such as Pepsi, AT&T,[19] Mango and KFC.

[20] He will make his feature directorial debut with "Paranormalcy", a fantasy film based on the New York Times bestselling book by Kiersten White.