1977–1992: Rise to prominence Dissatisfied with his career, Mahoney took acting classes at St. Nicholas Theatre, which inspired him to resign from his day job and pursue acting full-time. After a stage production in Chicago in 1977,
John Malkovich encouraged him to join the
Steppenwolf Theatre. He did so and went on to win the
Clarence Derwent Award as Most Promising Male Newcomer in 1986. Steppenwolf founder
Gary Sinise said in an interview for
Bomb Magazine that
Lyle Kessler's play
Orphans in 1985 "kicked John Mahoney,
Kevin Anderson and
Terry Kinney off into the movie business" after their Steppenwolf performance of the play for which he won the Derwent Award and the Theatre World Award. Mahoney won
Broadway's
Tony Award for Best Featured Actor in a Play in 1986 for his performance in
John Guare's
The House of Blue Leaves. Mahoney's first major film roles both came in 1987, in
Barry Levinson's
Tin Men and in
Peter Yates'
Suspect, a courtroom drama/mystery starring
Cher,
Dennis Quaid, and
Liam Neeson. In the next decade, he had prominent roles in many acclaimed films including the
John Patrick Shanley romantic comedy film
Moonstruck (1987) starring
Nicolas Cage and Cher. In 1988, Mahoney portrayed
Kid Gleason in the sports drama
Eight Men Out, and the following year portrayed the protective father in the
Cameron Crowe teen coming of age film
Say Anything... (1989). He portrayed Secret Service Director Sam Campagna in the
Wolfgang Petersen directed drama
In the Line of Fire (1993), Grant Gubler in
Ben Stiller's romance film
Reality Bites (1994), environmental lobbyist Leo Solomon in
Rob Reiner's political romance film
The American President (1995) and John Shaughnessy in the legal mystery thriller
Primal Fear (1996). and the screwball comedy
The Hudsucker Proxy. Mahoney also played a pivotal gay role in Greg Berlanti's 2000
GLAAD Media Award-winning film
The Broken Hearts Club: A Romantic Comedy.
1993–2004: Breakthrough in Frasier Mahoney appeared in
Frasier from its debut in 1993 until the final episode in 2004. He received two
Emmy nominations and two
Golden Globe nominations for the role of
Martin Crane, the father of
Frasier Crane and
Niles Crane. NBC executives held Mahoney in such high esteem that
Warren Littlefield declared he was pre-approved when the
Frasier creative team suggested casting him as the father. Before appearing on the series, Mahoney had appeared in the episode "
Do Not Forsake Me, O' My Postman" of
Cheers – from which
Frasier was a spinoff – as Sy Flembeck, an inept jingle writer who has a brief conversation with Frasier. Mahoney also appeared as a priest in
Becker, which starred
Cheers star
Ted Danson. Mahoney's first voice job was in
W. B. Yeats's "The Words upon the Window-Pane" for the award-winning
National Radio Theater of
Chicago. He provided the voices for several characters in
Antz (1998), Preston Whitmore in
Atlantis: The Lost Empire and ''
Atlantis: Milo's Return, General Rogard in The Iron Giant (1999), and Papi in Kronk's New Groove (but was succeeded by Jeff Bennett in The Emperor's New School'' for an unknown reason). In 2007, Mahoney provided the voice of Dr. Robert Terwilliger, Sr. (
Sideshow Bob's father) in
The Simpsons episode "
Funeral for a Fiend". This reunited him with his
Frasier co-stars
Kelsey Grammer (Sideshow Bob) and
David Hyde Pierce (Cecil, Sideshow Bob's brother).
2005–2018: Post-Frasier Mahoney co-starred as the Old Man in the Broadway revival of
Prelude to a Kiss at the American Airlines Theater in a limited-run engagement running from previews on February 17, 2007, through to April 29, 2007. He appeared as an elderly
drag queen in the
ER season 13 episode "Somebody to Love," and co-starred with
Steve Carell (himself a veteran of
Chicago theater) as the father of Carell's character in
Dan in Real Life. In March 2008, he opened in the world premiere of
Better Late at the
Northlight Theatre. He was also the narrator for Midwest Airlines commercials. Mahoney also made two appearances on
USA Network's
Burn Notice in the
second (2009) and
third (2010) season finales. His character, referred to only as "Management," is a senior intelligence agency official who is the apparent main mover of the conspiracy which
blacklisted
Michael Westen. Mahoney joined the cast of
In Treatment for the series' second season (2009) as a frenetic CEO who is overwhelmed by his personal and professional responsibilities and experiences chronic physical anxiety attacks. In 2010, he made a guest appearance on
$#*! My Dad Says as
homophobic retired naval officer Lt. Commander Wally Durham. Beginning in April 2011, Mahoney began rehearsing
The Outgoing Tide, a new play by Bruce Graham at Northlight Theatre in
Skokie, Illinois (
suburban Chicago). The play also stars fellow
Chicago actors
Rondi Reed and
Thom Cox. In 2011, he had two guest appearances on
Hot in Cleveland as Roy, a waiter and a love interest for
Betty White's character Elka. This reunited him with his
Frasier co-star
Jane Leeves, as well as
Wendie Malick whose character he eventually married in
Frasier and his co-star in the movie
The American President. Mahoney was a featured ensemble cast member in
The Birthday Party, playing in Chicago's
Steppenwolf Theatre from January 24 to April 28, 2013. His last role was in Steppenwolf's play
The Rembrandt, which ran from September to November 2017. Despite the numerous successes throughout his career, Mahoney maintained that his early work in the play
Orphans has "affected people more than any other play I've ever done. I still get mail from it, I still get people stopping me on the street, and it's 20 years later." ==Personal life==