Eagle Flashback: Led Zeppelin Meets Elvis in 1974 (Video)
The year was 1974 and Elvis Presley wanted to meet these young kids called "Led Zeppelin" that were out selling him.
The LA Forum was the location, and members of Led Zeppelin attend the Elvis concert. He was the "later years" Elvis, so there was some bumbling and stumbling but he still held the crowd in the palm of his hand.
The King played the hits, and referenced Led Zeppelin being in attendance...Here is the rest of the story from Robert Plant: