Sebastien "Seppe" Smits (born 13 July 1991) is a Belgian professional snowboarder and world championship medalist.

Smits was born in Westmalle and started snowboarding at a serious level in the winter of 2006–2007, competing in the Europa Cup.

[2] On 8 January 2011, Smits took over the lead in the Swatch TTR World Tour for 2011, after finishing fourth in Davos.

[3] One week later, at the 2011 world championships in Barcelona, Smits won a gold medal in the slopestyle competition and finished third in the Big Air after losing the tie-breaker for silver from Zach Stone.

Smits ended third in the final results of the 2010–2011 Swatch TTR World Tour, after three-times winner Peetu Piiroinen and Yuri Podladchikov.