Otello du Soleil (born March 15, 2002, died November 2023) was a bay-colored sport horse registered in the Selle Français studbook, who has been ridden mainly by Swiss show jumper Romain Duguet.

While he enabled Romain Duguet to break through to the highest level of show jumping competitions in 2011, notably with a victory at the Nations Cup stage in Sopot, Otello du Soleil is best known for having violently attacked the mare Quismy des Vaux in early June 2015, on the sidelines of the CSIO in Saint-Gallen Switzerland, leading to the cessation of the mare's sporting career, then to a court settlement.

He competed in a number of 1.60 m show jumping events, including the highly regarded Spruce Meadows CSIO in September 2015.

[11] He then went on to win a 1.50 m event at the CSIO5* in Rotterdam in June 2014, counting towards the Longines ranking, with the fastest clear round of the 51 starters; a fault in Thursday's jump-off had demoted him to 13th place.

[12] At the CSIO in St. Gallen, Switzerland, on June 6, 2015, he lost out in the hunter class (1.45 m) to Belgian rider Grégory Wathelet on Egano vh Slogenhof, despite a very fast finish and a very short turn over vertical obstacle no.

[13] On the night of June 6 to 7, 2015, taking advantage of a safety system failure, Otello du Soleil left his demountable stall and broke the stall latch of the mare Quismy des Vaux, whom he tried to jump, attacking her and seriously injuring her,[14][15][16] to the point of ending the mare's sporting career.

[22] In fine form for his first outings of 2016, in March he won the speed event at the CSI5* (Concours de saut international 5 étoiles) in Paris at the Grand Palais, as well as 5th place in the Prix Hermès sellier, both over 1.50 m obstacles.

[4] He was retired from sport at the end of November 2019, at the age of 17:[4][25][26][27] Christiana Duguet announced the news on social networks, specifying that Otello is still in good shape.