The Beatles star and the Beach Boys star have been rivals for 40 years, but have now become good friends.
According to ContactMusic, McCartney has agreed to perform with Wilson at the Royal Festival Hall next month.
A source told Britain’s Daily Express, "Paul and Brian are good mates and as Brian is going to be performing from Pepper, the word is Paul will join him on stage one night for a couple of songs."
The source added that McCartney and Wilson will likely put on a fantastic show together.