<br /> Julie Andrews has a significant cameo in DC Films' upcoming **Aquaman**.<br />Director James Wan confirmed the news on Twitter.<br />He said that Andrews is voicing Karathen, "the most powerful creature on Earth".<br />Karathen has been described as a giant undersea creature that has the power to unite the Atlantean and surface worlds.<br />“Who knew that Aquaman would have the real Mary Poppins this Christmas?” Aquaman Producer Peter Safran<br />**Aquaman** will hit theaters on December 21st. <br />
