The Bodyguard (1992)

"Never let her out of your sight. Never let your guard down. Never fall in love."

A former Secret Service agent grudgingly takes an assignment to protect a pop idol who's threatened by a crazed fan. At first, the safety-obsessed bodyguard and the self-indulgent diva totally clash. But before long, all that tension sparks fireworks of another sort, and the love-averse tough guy is torn between duty and romance.