Cara Delevingne and Ellie Goulding will speak at a virtual summit on ocean conservation issues today.
It's being hosted as part of World Oceans Day, which features a number of sessions from around the world.
A spokesperson for the event said: "Everyone can celebrate the creativity of the global events happening this year, which includes webinars, art exhibits, lectures, music, games, panels, photo contests, and much more.
"No matter where you live there are events you can engage in. And where it is safe, there are in-person community and coastal events."
"This year World Oceans Day has a keen focus on 30×30 – the global drive to protect at least 30% of the land and ocean by the year 2030.
"You can help by signing the 30×30 petition for our blue planet here.