John Travolta took to social media to reveal that he was grieving the loss of someone he considered a friend and many considered a legend.MORE: John Travolta's daughter Ella sparks huge reaction with heartbreaking new postALSO: HELLO! launches Jubilee T-shirt collection to celebrate Queen Elizabeth in styleThe actor shared that he was mourning the death of country star Mickey Gilley, who passed away the previous weekend at the age of 86.VIDEO: John Travolta's incredible show of support for EllaHe shared a snapshot of the two from the 1980 flick Urban Cowboy, which saw John's character frequent a club named Gilley's, Mickey's real life Texas nightclub, and was inspired by the country music scene at the time.The film not only proved to be a success for the star, but also revitalized Mickey's career, with the soundtrack kicking off a movement in soft-core country music in the 80s.MORE: John Travolta shares never-before-seen family photographs of late wife Kelly Preston for Mother's DayJohn penned: "'Mickey Gilley, the ultimate urban cowboy'. I was so sorry to see Mickey go.