It’s never good to hear about the passing of a popular celebrity, but there’s certain days when someone passes away you expected to be here forever, and those days hurt the most. Today is one of those days.

Legendary performer and universally popular talent Leslie Nielsen died Sunday at a hospital near his home in Florida. Nielsen passed away after a suffering from pneumonia. He was 84 years old.

For many of us who grew up in the ’80s, Nielsen was a man with purely genius comic delivery who made many appearances in parody films. What those people may not know is that Nielsen had been around for decades prior to his best-known works, and spent the majority of his career as a generally serious actor.

Longtime actor Peter Graves passed away Sunday at the age of 83.

Reports indicate that Graves went out to brunch with his wife and kids, and when they returned, the actor suffered a heart attack while walking to his door. His daughter attempted to perform CPR on him, but was unable to resuscitate her father.

Graves is perhaps best known as James Phelps on the Mission: Impossible television series. He appeared as the character in 143 episodes from 1967 to 1973, and then in another 35 episodes on a return of the show that ran from 1988 to 1990 before going on to become a major motion picture franchise. Those of us who are a bit younger will surely remember Graves for his role as Captain Clarence Oveur, the hilarious pilot in 1980’s Airplane!. He also starred in Airplane II: The Sequel. Later in his career, he appeared in 11 episodes of the popular show, 7th Heaven.