Kirk Douglas celebrates 101st birthday with son Michael and family: Pics!

Kirk Douglas spent his latest birthday surrounded by the people he loves.

The legendary actor turned 101 years old on Saturday, and on Monday, actor Michael Douglas -- one of Kirk's three living sons -- shared photos from their family celebration on Facebook. Kirk enjoyed a sunflower-themed birthday cake, as his wife, Anne Buydens, sat beside him. Kirk's son, producer Joel Douglas, was also present for the festivities, as was his granddaughter from son Peter, Kelsey Douglas.

"My brother Joel and I attend a family celebration for Kirk's 101st birthday on Saturday," Michael captioned the heartwarming post. "At 101 Dad is a true amazement and a great time was had by all."

Michael explained that the family celebrated Kirk's birthday by honoring some of the actor's greatest performances. For example, the sunflower cake was a tribute to his performance as Vincent Van Gogh in 1946's Lust for Life. A pair of boxing gloves from Kirk's first Academy Award nominated performance in 1949's Champion was also displayed.

Michael's wife, actress Catherine Zeta-Jones, also paid tribute to her father-in-law over the weekend with a sweet Instagram post calling him her "hero."

"101 today!!!! My darling Pappy on my knee," she wrote. "Happy Birthday to my wonderful, inspirational and loving father in law, Kirk. Love you with all my heart. ❤️#hero."

ET spoke with Michael and Catherine last month, when they revealed the secret to their long-lasting marriage.

"I think understanding, listening, being friends, all helps," Catherine shared. "It's been a great 17 years."

27 PHOTOS
Kirk and Anne Douglas through the years
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Kirk and Anne Douglas through the years
WARSAW, POLAND - 1 APRIL 1966: A visit of the American actor Kirk Douglas to Warsaw, Poland, on 1st April 1966. Pictured: Kirk Douglas and his wife Anne Buydens at the Warsaw airport. (Photo by Wojtek Laski/East News/Getty Images)
Film actor Kirk Douglas and his wife Anne pose for photographers as they arrive at Tempelhof airport in Berlin, 02 February 1964, for the promotion of his film 'Seven Days in May'. Douglas born in Amsterdam, New York, made his Broadway debut in 1941, served in the US Navy and embarked on a screen career in 1946. His films include Champion (1949), The bad and the Beautiful (1952), Lust for Life (1956), and Spartacus (1960). From the 1970s Douglas also worked as director. / AFP / DPA / - (Photo credit should read -/AFP/Getty Images)
BEVERLY HILLS, CA - MARCH 1: Kirk Douglas and wife Anne Buydens attend Sixth American Film Institute Lifetime Achievement Awards Honoring Henry Fonda on March 1, 1978 at the Beverly Hilton Hotel in Beverly Hills, California. (Photo by Ron Galella, Ltd./WireImage)
FRANCE - SEPTEMBER 09: Americain Film Festival.Kirk Douglas And His Wife Anne In Deauville, France On September 09, 1978 (Photo by Laurent MAOUS/Gamma-Rapho via Getty Images)
Kirk Douglas and wife Anne Douglas during Friars' Club Salute to Johnny Carson as 'Entertainer of the Year' 1979 at The Waldorf-Astoria Hotel in New York, New York, United States. (Photo by Ron Galella/WireImage)
21st May 1962: American actor Kirk Douglas and his wife Anne at the eighth annual Share Inc 'Boomtown Party' where sizable funds were raised for the 'Exceptional Children's Foundation'. (Photo by Nat Dallinger/Keystone/Getty Images)
LONDON, ENGLAND: Film actor Kirk Douglas and his wife Anne pose for photographers at the London airport, 18 August 1958. Douglas born in Amsterdam, Netherlands, made his Broadway debut in 1941, served in the US Navy and embarked on a screen career in 1946. His films include Champion (1949), The bad and the Beautiful (1952), Lust for Life (1956)j, and Spartacus (1960). From the 1970s Douglas also worked as director. (Photo credit should read AFP/AFP/Getty Images)
Kirk Douglas is embraced by his wife, Anne, in his dressing room after his opening performance in One Flew Over the Cuckoo's Nest at the Cort Theater November 13th. Douglas returned to Broadway stage after 17 years of movie stardom.
5th December 1960: Kirk Douglas and his wife Anne Budyens arriving in London for the premiere of his new film, 'Spartacus'. (Photo by Dennis Oulds/Central Press/Getty Images)
(GERMANY OUT) Douglas, Kirk *09.12.1916- (Eigentlich Issur Danielowitsch Demsky) Schauspieler, USA - mit seiner Frau Anne Buydens und seinen Kindern - undatiert (Photo by ullstein bild/ullstein bild via Getty Images)
LOS ANGELES - CIRCA 1967: Actor Kirk Douglas and his wife Anne Buydens arrive for a party in Los Angeles, California. (Photo by Earl Leaf/Michael Ochs Archives/Getty Images)
FRANCE - SEPTEMBER 09: Americain Film Festival.Kirk Douglas And His Wife Anne In Deauville, France On September 09, 1978 (Photo by Laurent MAOUS/Gamma-Rapho via Getty Images)
NEW YORK CITY - OCTOBER 27: Kirk Douglas and wife Anne Douglas sighted on October 27, 1981 at Elaine's Restaurant in New York City. (Photo by Ron Galella, Ltd./WireImage)
Kirk Douglas and Anne Douglas during 30th Anniversary of the Joffery Ballet at Dorothy Chandler Pavilion in Los Angeles, California, United States. (Photo by Ron Galella/WireImage)
Kirk Douglas and Anne Douglas during 57th Annual Academy Awards at Dorothy Chandler Pavilion in Los Angeles, California, United States. (Photo by Ron Galella/WireImage)
Anne Douglas and Kirk Douglas (Photo by Ron Galella/WireImage)
Kirk Douglas and Anne Douglas during 43rd Annual Writers Guild of America Awards at Beverly Hilton Hotel in Beverly Hills, California, United States. (Photo by Jim Smeal/WireImage)
Kirk Douglas and Anne Douglas during Share Boomtown Party at Santa Monica Civic Center in Santa Monica, California, United States. (Photo by Ron Galella, Ltd./WireImage)
Kirk Douglas and Anne Douglas during 8th Annual American Cinema Awards at Beverly Hilton Hotel in Beverly Hills, California, United States. (Photo by Jim Smeal/WireImage)
370031 02: Kirk Douglas, right, accompanied by his wife Anne, waves to the press while attending the dedication of Kirk Douglas High School May 24, 2000 in Northridge, CA. (Photo by Jason Kirk/Online USA)
LOS ANGELES, UNITED STATES: LAX41-20000329-LOS ANGELES, CA, UNITED STATES: Actor Kirk Douglas and his wife Anne arrive at Cedars-Sinai Medical Center's annual fundraising gala to benefit breast cancer research 28 March 2000 in Los Angeles. US First Lady Hillary Rodham Clinton received the organization's Women of Courage award. (ELECTRONIC IMAGE) AFP PHOTO Jim RUYMEN/jr (Photo credit should read JIM RUYMEN/AFP/Getty Images)
(Original Caption) Kirk and Anne Douglas arrive. (Photo by Jody Cortes/Sygma/Sygma via Getty Images)
Philanthropist Anne Buydens and her husband, actor and Kennedy Center Honors Awards recipient Kirk Douglas, with their son Eric, arrive at the North Portico of the White House to attend a reception, Washington DC, December 4, 1994. (Photo by Mark Reinstein/Getty Images)
51. Berlinale : Champagnerempfang F�r Kirk + Anne Douglas (Photo by Franziska Krug/Getty Images)
LOS ANGELES, CA - SEPTEMBER 19: Actor Kirk Douglas and wife Anne attend the official dedication of the Los Angeles Mission's new Urban Training Institutute on September 19, 2002 in Los Angeles, California. (Photo by Frazer Harrison/Getty Images)
Anne & Kirk Douglas at the Hollywood Foreign Press Association Luncheon to benefit Hollywood non-profit organizations and film schools, held at the Beverly Hills Hotel on Monday, August 19, 2002. (Photo by Kevin Winter/Getty Images).
Kirk Douglas (R) and wife Anne Douglas during It Runs in the Family New York Premiere - Outside Arrivals at Loews Lincoln Square in New York City, New York, United States. (Photo by Jim Spellman/WireImage)
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