A growing number of figures from the film and TV industry in the U.K. have signed a letter urging British politicians to support the people of Iran as the country faces global condemnation for executing several of those involved in the wave of protests that erupted last year.

The letter, instigated by British-Iranian filmmaker Babak Anvari, calls for members of U.K. parliament to actively campaign for Iran to stop violence against protesters and end all executions, to hold Iran accountable for the “gross violations of human rights and women’s rights,” and to demand that Iran releases all political prisoners.

Among the almost 100 names to have signed the letter, which is still circulating and gathering attention, are Olivia Colman, Martin McDonagh, Jessie Buckley, Phoebe Waller-Bridge, Brett Goldstein, Jonathan Pryce, Hugh Bonneville, Richard Curtis, Gillian Anderson, Felicity Jones, George Mackay, Edgar Wright and Hayley Atwell.

The letter is the latest...