Michael Caine, whose birth name is Maurice Micklewhite, legally changed it to his stage name after years of airport security confusion in the age of terrorism. Caine is an easily recognizable international actor, so when he would hand over his passport with the name "Maurice Micklewhite," it would confuse airport security and cause him delays.

He told The Sun the real culprit behind long airport security lines, saying "I changed my name when all the stuff started with ISIS and all that."

Sources: The Guardian | The Sun