Beyond his incredible acting and comedic skills, Robin Williams was known for being an animal lover.

The late actor made one of his last public appearances at the San Francisco Zoo on June 6 when they honored Williams by naming one of their Howler Monkeys after him.

In one of his last posts on Instagram, he wrote about his day at the zoo: “Feeding ‘Robin Williams’ @sanfranciscozoo. He’s their newest [Howler] Monkey, named after me!”

Williams’ love for animals began long before social media, but he made it apparent by posting snapshots with his pets and animals he met on set.

His dog Leonard was one of Williams’ close companions: “Worth a repeat. My dinner with Leonard. Miss him when I’m on location.”

Taken just a few short weeks before his death, Williams spent time with his “Night at the Museum 3” costar: “Happy Birthday to me! A visit from one of my favorite leading ladies, Crystal.”

He made his affection toward all animals clear when he posted this tribute: “RIP Miss Verna Pearl. She was my assistant’s dog but my road dog, my trailer dog. Suddenly and without warning. We will miss her when we go back to work today on #thecrazyones. Adopted from the @sfspca #adoptandrescue”

And he once got into a tickle fight with Koko, a famous gorilla.

Less than a month after his trip to the San Francisco Zoo, Williams checked into the Hazelden, an addiction treatment center in Minnesota for continued sobriety.

The 63-year-old was found dead of apparent suicide in his home on Monday.

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THE NIGHT LISTENER, Robin Williams, 2006, ©IFC Films/courtesy Everett Collection
As a father figure in "The Night Listener" in 2006Everett Collection
NORFOLK, VIRGINIA - OCTOBER 26: Robin Williams photographed backstage before his performance at the Ted Constant Convocation Center during a 30-city tour October, 26, 2009 in Norfolk, Virginia. (Photo by Jay Paul/Getty Images)
Backstage before performing in Norfolk, Va., in 2009Getty
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THE WORLD ACCORDING TO GARP, (aka LE MONDE SELON GARP), John Irving (center), Robin Williams (right), 1982, © Warner Brothers/courtesy Everett Collection
Wrestling as the title character in "The World According to Garp" (with author John Irving in a cameo as the referee)Everett Collection
MORK AND MINDY, from left, Raquel Welch, Robin Williams, epsidoe aired November 18, 1979, 1978-82, ©Paramount Television/Courtesy: Everett Collection
With Raquel Welch on "Mork and Mindy"
FILE - This Nov. 12, 1979 file photo shows actor-comedian Robin Williams, third from right, dressed as a cheerleader with the Broncos' Pony Express cheerleaders during the filming of an episode of "Mork & Mindy," in Denver. Williams, whose free-form comedy and adept impressions dazzled audiences for decades, has died in an apparent suicide. He was 63. The Marin County Sheriff’s Office said Williams was pronounced dead at his home in California on Monday, Aug. 11, 2014. The sheriff’s office said a preliminary investigation showed the cause of death to be a suicide due to asphyxia. (AP Photo/File)
As a Denver Broncos Pony Express cheerleader in 1979AP
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WHAT DREAMS MAY COME, Robin Williams, 1998, (c)PolyGram Filmed Entertainment/courtesy Everett Collection
Heaven was both real and imaginary for Williams in "What Dreams May Come" in 1998.Everett Collection
TOYS, Robin Williams, 1992, TM and Copyright ©20th Century Fox Film Corp. All rights reserved./courtesy Everett Collection
In "Toys" in 1992Everett Collection
PATCH ADAMS, Robin Williams (left), 1998. © Universal Pictures/ Courtesy: Everett Collection
As "Patch Adams" in 1998Everett Collection
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MOSCOW ON THE HUDSON, Robin Williams, 1984
In "Moscow on the Hudson" in 1984Everett Collection
JACK, from left: Diane Lane, Robin Williams, 1996, © Buena Vista/courtesy Everett Collection
In "Jack" in 1996Everett Collection
As "Jack" in 1996Everett Collection
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Comedian Robin Williams performs at Hard Rock Live at the Seminole Hard Rock Hotel & Casino on October 21, 2009 in Hollywood, Florida. Pictured: Robin Williams Ref: SPL819429 110814 Picture by: Splash News Splash News and Pictures Los Angeles: 310-821-2666 New York: 212-619-2666 London: 870-934-2666 photodesk@splashnews.com
Performing at Hard Rock Live in Hollywood, Fla., in 2009
CADILLAC MAN, Robin Williams, 1990. ©Orion Pictures Corp/courtesy Everett Collection
In "Cadillac Man" in 1990Everett Collection
With John Turturro in "Being Human" in 1994
With John Turturro in "Being Human" in 1994Everett Collection
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"The Adventures of Baron Munchausen" in 1988
"The Adventures of Baron Munchausen" in 1988Everett Collection
WORLD'S GREATEST DAD, Robin Williams (center), 2009. ©Magnolia Pictures/Courtesy Everett Collection
In "World's Greatest Dad" in 2009Everett Collection
POPEYE, Robin Williams as Popeye, 1980. ©Paramount/courtesy Everett Collection
As the super-strong, spinach-loving sailor "Popeye" in 1980Everett Collection
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MAN OF THE YEAR, Robin Williams (center), 2006, ©Universal/courtesy Everett Collection
As a Jon Stewart-type funnyman in "Man of the Year" in 2006Ava Gerlitz/Universal
JUMANJI, Robin Williams, 1995, ©Columbia TriStar/courtesy Everett Collection
Williams was a pawn in a board game that came to life in "Jumanji" in 1996.Everett Collection
JAKOB THE LIAR, Robin Williams, 1999. ©Sony Pictures/Courtesy Everett Collection
As a shopkeeper spreading hope through his Holocaust ghetto in Poland in "Jakob the Liar" in 1999Everett Collection
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INSOMNIA, Robin Williams, Al Pacino, 2002 (c) Warner Brothers, courtesy Everett Collection
In "Insomnia" with Al Pacino in 2002Everett Collection
Nolan, ROBIN WILLIAMS. Photographer: DP Chung Hoon Chung
In "Boulevard" in 2014Everett Collection
THE BIG WHITE, Robin Williams, 2005. ©Ascendant Pictures/courtesy Everett Collection
In "The Big White" in 2005Everett Collection
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CLUB PARADISE, from left, Robin Williams, Eugene Levy, 1986, ©Warner Bros./courtesy Everett Collection
With director Harold Ramis on the set of "Club Paradise" in 1986Everett Collection
THE FISHER KING, Robin Williams, 1991, © TriStar/courtesy Everett Collection
In "The Fisher King" in 1991Everett Collection
FATHERS' DAY, from left: Robin Williams, Billy Crystal, 1997, © Warner Brothers/courtesy Everett Collection
Robin Williams and Billy Crystal in "Father's Day" in 1997Everett Collection
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BICENTENNIAL MAN, Robin Williams, 1999, © Columbia/courtesy Everett Collection
In "Bicentennial Man" in 1999Everett Collection
THE BEST OF TIMES, from left: Robin Williams, Kurt Russell, 1986, © Universal/courtesy Everett Collection
In "The Best of Times" with Kurt Russell in 1986Everett Collection
FILE AUGUST 11: According to reports August 11, 2014 actor Robin Williams has died of a suspected suicide in Tiburon, California. He was 63. AUSTIN, TX - FEBRUARY 19: Comedian Robin Williams performs in concert at The Frank Erwin Center on February 19, 2009 in Austin, Texas. (Photo by Gary Miller/FilmMagic)
Performing at the Frank Erwin Center in Austin, Texas, in 2009FilmMagic
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NEW YORK, NY - SEPTEMBER 25: Robin Williams filming Phil Alden Robinson's "The Angriest Man In Brooklyn"on theStreets of Brooklyn on September 25, 2012 in New York City. (Photo by Aby Baker/Getty Images)
Filming "The Angriest Man in Brooklyn" in 2012Getty
Mork also found himself landing on "Happy Days," in two appearances in 1978 and 1979.
Mork also found himself landing on "Happy Days," in two appearances in 1978 and 1979.ABC
Opposite Al Pacino in "Insomnia" (2002).
Opposite Al Pacino in "Insomnia" (2002)Warner Bros.
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At right in another animated persona, Fender, in "Robots" (2005).
At right in another animated persona, Fender, in "Robots" (2005)Twentieth Century Fox
Sharing a laugh with daughter Zelda and co-star Anton Yelchin in "House of D" (2004).
Sharing a laugh with daughter Zelda and co-star Anton Yelchin in "House of D" (2004)Lionsgate
With Nathan Lane in the screen adaptation of "The Birdcage" (1996).
With Nathan Lane in the screen adaptation of "The Birdcage" (1996)United Artists
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Williams voiced this colorful penguin in "Happy Feet" (2006) and a sequel (2011).
Williams voiced this colorful penguin in "Happy Feet" (2006) and a sequel (2011).Warner Bros.
In drag to remain with his estranged family in "Mrs. Doubtfire" (1993).
In drag to remain with his estranged family in "Mrs. Doubtfire" (1993)Twentieth Century Fox
Perhaps his most popular tole, that of mouthy armed forces radio host Adrian Cronauer in "Good Morning, Vietnam" (1987).
Perhaps his most popular role, that of mouthy armed forces radio host Adrian Cronauer in "Good Morning, Vietnam" (1987)Touchstone Pictures
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With Cheryl Hines in "RV" (2006)
With Cheryl Hines in "RV" (2006)Columbia Pictures
With Freddie Highmore in tow in "August Rush" (2007)
With Freddie Highmore in tow in "August Rush" (2007)Warner Bros
Flanked by John Krasinski and Mandy Moore in "License to Wed" (2007).
Flanked by John Krasinski and Mandy Moore in "License to Wed" (2007)Warner Bros.
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With John Travolta in "Old Dogs" (2009)
With John Travolta in "Old Dogs" (2009)Disney
With longtime pals Whoopi Goldberg and Billy Crystal at their 1986 Comic Relief telethon.
With longtime pals Whoopi Goldberg and Billy Crystal at their 1986 Comic Relief telethonComic Relief
With Chris Meloni and Mariska Hargitay in a 2008 guest spot on "Law & Order: Criminal Intent."
With Chris Meloni and Mariska Hargitay in a 2008 guest spot on "Law & Order: Special Victims Unit"NBC
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As grown-up Peter Pan, face to face with Dustin Hoffman's Captain Hook in "Hook."
As a grown-up Peter Pan, face to face with Dustin Hoffman's Captain Hook in "Hook" (1991) Amblin Entertainment
As absent-minded Phillip Brainard in "Flubber" (1997)
As absent-minded Phillip Brainard in "Flubber" (1997)Buena Vista Pictures
With Edward Norton in the cult favorite "Death to Smoochy" (2002).
With Edward Norton in the cult favorite "Death to Smoochy" (2002)Warner Bros.
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In the thriller "Final Cut" (2004)
In the thriller "Final Cut" (2004) Lionsgate
As the Genie in Disney's animated "Aladdin" (1992).
As the voice of the Genie in Disney's animated "Aladdin" (1992)Disney
On his recent CBS sitcom "The Crazy Ones," which lasted one season.
On his recent CBS sitcom "The Crazy Ones," which lasted one seasonCBS
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As a creepy photomat tech in "One Hour Photo" (2002).
As a creepy photomat tech in "One Hour Photo" (2002)Fox Searchlight Pictures
As Dwight D. Eisenhower, alongside Forest Whitaker, in "Lee Daniels' The Butler" (2013)
As Dwight D. Eisenhower, alongside Forest Whitaker, in "Lee Daniels' The Butler" (2013)The Weinstein Company
"Moscow on the Hudson" (1984)
"Moscow on the Hudson" (1984)Columbia Pictures
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With Mila Kunis in his latest, "The Angriest Man in Brooklyn" (2014)
With Mila Kunis in his latest, "The Angriest Man in Brooklyn" (2014)Lionsgate
With Robert De Niro in "Awakenings" (1990)
With Robert DeNiro in "Awakenings" (1990)Columbia Pictures
In his breakout role as spaceman Mork from Ork — with Pam Dawber — in a 1978 episode of "Mork & Mindy" ABC
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"Dead Poets Society" (1989)
"Dead Poets Society" (1989)Touchstone PIctures
With Ben Stiller in "Night at the Museum" (2006)
With Ben Stiller in "Night at the Museum" (2006)20th Century Fox Film Corp.
With Matt Damon in "Good Will Hunting" (1997), for which Williams won Best Supporting Actor at the Academy Awards.
With Matt Damon in "Good Will Hunting" (1997), for which Williams won Best Supporting Actor at the Academy AwardsMiramax
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