Yalennis Castillo Ramírez is a Cuban judoka. She was born in Moa, Holguín, Cuba on 21 May 1986. She practiced judo since she was a child.

The 2007 World Judo Championships are the 25th edition of the Judo World Championships, and were held at the Rio Olympic Arena, usually called Arena Multiuso, that was built for the 2007 Pan-American Games, in Jacarepaguá, Rio de Janeiro, Brazil from September 13 to September 16, 2007.