Paul McCartney and his family have teamed up with Moby, Joaquin Phoenix, Rooney Mara and Ela Gandhi to call on world leaders at COP26 to adopt the Plant Based Treaty as a companion to the Paris agreement.

"We believe in justice for animals, the environment and people. That’s why we support the Plant Based Treaty and urge individuals and governments to sign it," the McCartneys said in a joint statement.

The group behind the Plant Based Treaty initiative describe it as a "grassroots campaign designed to put food systems at the forefront of combating the climate crisis."

Anita Krajnc, Plant Based Treaty Global Campaign Coordinator, explained that "around the world, scientists, government representatives, faith leaders, and now celebrity voices are calling for a halt to the expansion of animal agriculture and deforestation,."

She says that the group is calling for a shift to a plant-based food system, and reforestation and rewilding of land.

"Increasingly people are recognising that meat, dairy and egg consumption are driving carbon dioxide, methane and nitrous oxide emissions, the three major greenhouse gases – now we need COP26 delegates and other leaders to acknowledge it."

In other McCartney news, Paul recently inducted the Foo Fighters into the Rock and Roll Hall of Fame earlier this month.

McCartney inducted the American group into the Hall of Fame in their first year of eligibility on Saturday night before joining them for a special performance. The band played 'Best Of You,' 'My Hero' and 'Everlong' before their acceptance speech and The Beatles’ bassist joined them on stage for a performance of 'Get Back.'

Watch fan-captured videos of Foo Fighters and Paull McCartney's performance of 'Get Back' below.