1) Cary Grant, often 2) Co-star 3) Denzel washington, often 4) Dude with a lot of lines 5) Male film star 6) Male movie star 7) Sort of star 
Leading man or leading gentleman is an informal term for the actor who plays a love interest to the leading actress in a film or play. A leading man is usually an all rounder; capable of singing, dancing, and acting at a professional level. A leading man can also be an actor who is often seen in romantic roles. An example of this would be Bruce Ca...
[n] - actor who plays the leading male role
noun actor who plays the leading male role