The Golden Globe winner teamed up with the animal rights charity in 2012 to work towards ending the practice, and the drive has now taken a big step forward in the U.S. with the introduction of a bill to bring in the new Humane Cosmetics Act.

If made law, the act is expected to end animal testing for cosmetics after 12 months and phase out the sale of animal-tested cosmetics in three years, and Dinklage is urging fellow Americans to support the bill.

In a statement, he says, "Testing cosmetics on animals is a cruel, outdated, and unnecessary practice. I am proud to join Cruelty Free International in supporting the Humane Cosmetics Act to end cosmetics testing on animals in the United States."

Cruelty Free International Chief Executive, Michelle Thew commented, "We congratulate U.S. Representatives... for introducing this landmark bill. We are delighted to have the support of Peter Dinklage and we now urge everyone to call on their Representatives to get behind the Humane Cosmetics Act so that the United States can join the global trend in moving away from the cruel use of animals to test cosmetics."

The testing of cosmetics on animals was banned in Europe in 2013.