Kirk Douglas through the years

Actor Kirk Douglas speaks during the MPTF 95th anniversary celebration with Hollywood's Night Under the Stars at MPTF Wasserman Campus on Oct. 1, 2016, in Los Angeles.

Kirk Douglas poses for a portrait in 2014, shortly after his 98th birthday. The "Spartacus" star has 87 films and 11 books to his name. He is one of the last living members of old Hollywood.

Kirk Douglas arrives at the 2013 Vanity Fair Oscars viewing and after-party at the Sunset Plaza Hotel in West Hollywood.

Douglas and his wife, Anne, arrive at the 2013 Vanity Fair Oscars Viewing Party and After-Party at the Sunset Plaza Hotel in West Hollywood.

Michael Douglas and his father at the Vanity Fair Oscar party in West Hollywood, Feb. 26, 2012.

Kirk and Anne Douglas arrive at the Entertainment Industry Foundation's "Unforgettable Evening" in Beverly Hills, April 18, 2012.

Actor Michael Douglas introduces his father, honoree Kirk Douglas, at the "Children at Heart" gala dinner at Pier Sixty in Manhattan, Nov. 21, 2011.

Michael Douglas, Anne Douglas, Catherine Zeta-Jones and Kirk Douglas in Manhattan, May 24, 2010.

Director Quentin Tarantino interviews Kirk Douglas at the Santa Barbara International Film Festival in Santa Barbara, Feb. 7, 2010.

Kirk Douglas tries out the slide during a playground dedication in Los Angeles, May 28, 2008.

Michael and Kirk Douglas arrive for the funeral of Jack Valenti, an adviser of President Lyndon B. Johnson and a former president of the Motion Picture Association of America, in 2007.

Catherine Zeta-Jones sits between Kirk Douglas and her husband, Michael Douglas, at the U.S. Open tennis tournament in Flushing, Sept. 8, 2007.

Kirk Douglas and his wife, Anne, renew their wedding vows after 50 years of marriage on May 23, 2004.

Douglas embraces his grandson Cameron at a screening of "It Runs in the Family" in 2003.

Douglas poses for the media after a news conference in Berlin, Feb. 15, 2001.

Kirk and Anne Douglas at the premiere of the film "America's Sweethearts" in the Westwood section of Los Angeles, July 17, 2001.

Kirk and Anne Douglas in Manhattan, Nov. 17, 2000.

Kirk Douglas and Lauren Bacall in Normandy, France, Sept. 7, 1999.

Kirk Douglas after receiving the Screen Actors Guild Life Achievement Award in Los Angeles, March 7, 1999.

Michael Douglas shares a laugh with his father during the 1999 "Michael Douglas and Friends" charity golf event in California.

The Douglas family gathers during a reception in 1991 in New York. From left are: Kirk Douglas; then-daughter-in-law Diandra; her son Cameron; Anne Douglas and Michael Douglas.

Kirk Douglas and Raquel Welch at the 50th Academy Awards on April 3, 1978.

A young Michael Douglas receives performing advice from his father as the elder Douglas visited a Hollywood studio to watch his son work in his first film in 1969 in Los Angeles.

Kirk Douglas in Hollywood with his sons Michael, 14, Eric, 1, Peter, 3, and Joel, 12, June 19, 1959.

Kirk Douglas and his wife, Anne, arrive in New York on a cruise liner from Europe, Oct. 22, 1957.

In 1957, Kirk Douglas starred in Stanley Kubrick's gripping World War I drama "Paths of Glory."

Kirk Douglas portrays artist Vincent Van Gogh in the 1956 movie "Lust for Life."

Kirk Douglas during filming of "Paths of Glory" in 1956.

Actor Kirk Douglas and his former wife, Diana Douglas, go over their lines for a scene in "The Indian Fighter," being made on location near Bend, Ore, June 8, 1955.

Actor Kirk Douglas is greeted by his sons, Joel, left, 6, and Michael, 9, after arriving from Europe in Queens in December 1953.

Kirk Douglas on the set of "Ulysses" on June 11, 1953.

Kirk Douglas and Rita Hayworth in Hollywood on March 14, 1952.

Kirk Douglas escorts Patricia Neal to a premiere at Hollywood Theater on June 23, 1949.

Actors Kirk and Diana Douglas pose with their second son, Joel, for his first portrait in Los Angeles.

Kirk Douglas in 1947.