Friends casting director Leslie Litt has revealed that she came very close to securing Paul McCartney as a guest star on the show.
The Beatles star was unable to take on the role of Ross' father-in-law due to recording and touring commitments but he would have played Helen Baxendale's on-screen father in the 1998 London episodes in which Ross marries Emily.
Speaking with The Huffington Post, Litt said, "I went through his manager and gave him all the details. One day, someone in the office brought me a faxed letter written to me by Paul himself! He thanked me for my interest and said how flattered he was, but it was a very busy time for him."