Those "woo-oos" in the DuckTales theme song aren't so easy to do after all. In the exclusive video above, the stars of Disney XD's DuckTales reboot try their best—try being the operative word—to nail the iconic theme song. They eventually did, which you can see here, but it wasn't without some laughs.

DuckTales stars Bobby Moynihan as Louie, Ben Schwartz as Dewey, Danny Pudi as Huey, Kate Micucci as Webby, Toks Olagundoye as Mrs. Beakley, Beck Bennett as Launchpad McQuack and David Tennant as Scrooge McDuck. The original cast announcement video generated nearly 10 million views.