By Ash Percival
As well as Oscar-winning actress Natalie Portman and 50 Shades of Grey star Jamie Dornan, they include singer Sia, model Cara Delevingne, actor Will Ferrell, US chat show host Jimmy Fallon, singer Labrinth and Bridesmaids stars Maya Rudolph and Chris O’Dowd.
Gal also managed to enlist her Wonder Woman predecessor, Lynda Carter.
Other names included Pedro Pascal, Zoe Kravitz, Leslie Odom Jr, Eddie Benjamin, Ashley Benson, Norah Jones, Kaia Gerber and Annie Mumolo.
Gal captioned the post: “We are in this together, we will get through it together.
“Let’s imagine together. Sing with us. All love to you, from me and my dear friends.”