13 Best Secret Cameos In Marvel Movies

12. Gary Sinise - Captain America: The Winter Soldier

Gary Sinise is fairy recognisable given his CV has seen him in major blockbusters and as the lead in a CSI show, so you might be somewhat confused that you don't remember seeing him in the first Captain America sequel.

But then, you wouldn't have seen him. The Oscar-nominated actor only lent his voice to the Captain America and the Howling Commandos museum exhibit that Bucky Barnes visits at the end of the movie.

Testament early on to the pulling power Marvel have even when casting tiny roles.