Sir Paul McCartney is a "big fan" of the Queen, but reckons he "could easily do" her job.
He said: "I think she's great and does a great job. People say, 'Ugh, the monarchy and all that', but what are you going to get in return?
"[Prime Minister] David Cameron? I'm not sure I want him to represent all of Britain. So if I get asked I could easily do it."
The Beatles musician hinted he could perform at the monarch's Diamond Jubilee later this year and is also rumoured to be in line to celebrate the 2012 London Olympics by playing at the opening ceremony in July.
He added: "I am seeing the guy because there is something they want me to do. I might be doing something in the Olympics. I won't know until then."
Paul's old bandmate Ringo Starr - the only other surviving member of The Beatles - recently told how they still hang out together.
He said: "We do hang out a bit but we're not in each other's pockets, and if the opportunity is real, I've played on a couple of his records, he's played on mine."
However, Ringo ruled out a reunion at the Olympics as he is booked to be on tour in the US at that time.