He and The China Syndrome (1979) co-stars Michael Douglas and Jane Fonda have all won Oscars for Leading Roles. Lemmon won for Save the Tiger (1973), Fonda won for Klute (1971), and Douglas won for Wall Street (1987).
He once had a Baskin-Robbins ice cream flavor named after him: "Jack Lemmon". It was still being produced in the early 1980s but has since been discontinued and is not listed on the Baskin-Robbins website.
He studied with Uta Hagen, and considers her his prime early mentor.
He was pleasantly shocked by Golden Globe winner Ving Rhames in 1998 when Rhames called him up to the stage and actually gave him the award for Best Actor in a TV Movie, which he had just won, to express his admiration to the veteran actor.
He was voted the 33rd Greatest Movie Star of all time by Entertainment Weekly.
He was voted the 45th Greatest Movie Star of all time by Premiere Magazine.
His father, John Uhler Lemmon II has an uncredited role in The Notorious Landlady (1962).
His headstone reads "Jack Lemmon in".
His performance as Jerry/Daphne in Some Like It Hot (1959) is ranked #29 on Premiere Magazine's 100 Greatest Movie Characters of All Time.
His performance as Jerry/Daphne in Some Like It Hot (1959) is ranked #65 on Premiere Magazine's 100 Greatest Performances of All Time (2006).
His son, Chris Lemmon, appeared with him in Airport '77 (1977).
Holds the record for most Golden Globe nominations for acting, including both actors and actresses (22 total).
In Harvard, he was in Navy ROTC and graduated with a degree in "War Service Sciences."
Is a recipient of the Connor Award, an award given to someone who displays an excellence in the communicative arts, handed out by the brothers of the fraternity Phi Alpha Tau from Emerson College in Boston.
Jack Lemmon was the top male Box Office Star of 1964, as ranked by Quigley Publications' survey of movie exhibitors. He ranked #2 that year, topped only by Doris Day. In the 11 years from 1960 to 1970, Lemmon was ranked a Top 10 Box Office Star eight times (1960, 1963, 1964, 1965, 1966, 1968, 1969 and 1970).
Lemmon admitted to having had a serious drinking problem at one time, which is one reason he looked back on his Oscar-winning role as Harry Stoner in Save the Tiger (1973) as perhaps the most gratifying, emotionally fulfilling performance of his career.
Lemmon passed away four days shy of one year after his frequent co-star, Walter Matthau.
Lemmon's dad, a bakery executive, didn't approve of his son taking up acting, but told him he should continue with it only as long as he felt passion for it, adding: "The day I don't find romance in a loaf of bread..." His dying words to Jack were: "Spread a little sunshine."
Openly admitted on "Inside the Actors Studio" (1994) that he was an alcoholic.
Owner of Jalem Productions, which co-produced many of his films as well as Cool Hand Luke (1967) starring Paul Newman.