Beatles legend Paul McCartney on Thursday posted a message on social media for Queen Elizabeth II, congratulating her on the occasion of her Platinum Jubilee, which marks her 70th year on the throne.

"70 beautiful years of Queen Elizabeth the second. Congrats ma' am! And thanks," McCartney wrote.

Accompanying the caption was a photo of McCartney with the queen in 1996 at the opening of the Liverpool Institute for Performing Arts, which McCartney co-founded.

A variety of Platinum Jubilee events commemorating Elizabeth's 70th anniversary have been scheduled over the next few days.

In addition to Thursday's Trooping the Color military parade and beacon lighting ceremony, and Friday's church service, celebrants may also look forward to a Sunday pageant, a horse race at Epsom Downs, and a massive concert on Saturday evening.

The Platinum Party at the Palace concert will feature performances from music icons like Rod Stewart, Elton John, Queen + Adam Lambert, Duran Duran, Diana Ross and several others.

McCartney is currently touring the U.S. and is not slated to perform. His next concert stop will take place the same day, Saturday, June 4, in Syracuse, New York.

See the full lineup for the Platinum Party at the Palace here.

Find live updates on Queen Elizabeth's Platinum Jubilee here.