Sad news for TV fans everywhere: actor Jack Klugman, best known for his roles as Oscar Madison on '70s sitcom classic The Odd Couple and Dr. Quincy on Quincy M.E., died on Monday Night (December 24) at age 90.

Klugman passed away while in his California home. According to his son Adam, his health had been in decline all year, reports the LA Times.

He will be missed.

Source: LA Times