Paul McCartney is urging fans to mark Valentine's Day by sending their beloved a copy of his most romantic song.

The Beatles legend wrote My Valentine for his wife Nancy Shevell, and now he wants devotees to use the track in their own celebrations on Thursday.

Fans can send a special online Valentine's Day card, featuring the track as well as their own personal message, through McCartney's official website.

A post on the Beatle's Twitter page directs fans to the site with the message, "To celebrate happy Valentine's Day here's Paul's My Valentine. Send it to your valentine."