The jam session seems to have happened by pure chance. Perkins, who by this time had already met success with "Blue Suede Shoes", had come into the studios that day accompanied by his brothers Clayton and Jay and by drummer W.S. Holland, their aim being to record some new material, including a revamped version of an old blues song, "Matchbox". Sam Phillips, the owner of Sun Records, who wanted to try to fatten this sparse rockabilly instrumentation, had brought in his latest acquisition, Jerry Lee Lewis, still unknown outside Memphis, to play piano (at the time, a Wurlitzer Spinet) on the Perkins session. Lewis's first Sun single would be released a few days later. Sometime in the early afternoon, 21-year-old Elvis Presley, a former Sun artist now with RCA Victor, arrived to pay a casual visit accompanied by a girlfriend, Marilyn Evans.