British Queen Elizabeth has invited King Felipe and Queen Letizia for a state visit next March.
Their Majesties will stay at Windsor Castle during their time in the United Kingdom.
King Juan Carlos and Queen Sofia visited Queen Elizabeth on an official state visit in 1986.
Queen Elizabeth and her husband paid a visit to Spain in 1988.
There have been several other royal visits since, but more informal in nature.
Both families have friendship and blood ties.