'The Partridge Family' star David Cassidy reveals heartbreaking battle with dementia

David Cassidy revealed he's battling dementia.

The 66-year-old actor, who is best known for his starring role as Keith Partridge on the hit series "The Partridge Family," disclosed the heartbreaking diagnosis in an interview with People.

Cassidy said his grandfather and mother both battled with the memory loss disease, so he knew there was a high chance it would happen to him too.

"I was in denial, but a part of me always knew this was coming."

The Hollywood icon has recently made the decision to stop touring as a musician in order to focus on himself.

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David Cassidy through the years
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David Cassidy through the years
UNITED STATES - JULY 28: THE PARTRIDGE FAMILY - 'Gallery' 1971 David Cassidy (Photo by ABC Photo Archives/ABC via Getty Images)
TODAY -- Pictured: (l-r) NBC News' Savannah Guthrie, Natalie Morales and musician/actor David Cassidy appear on NBC News' 'Today' show on March 21, 2013 -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
HOLLYWOOD, CA - DECEMBER 14: Singer David Cassidy performs at Hollywood Today Live at W Hollywood on December 14, 2016 in Hollywood, California. (Photo by David Livingston/Getty Images)
UNITED STATES - JULY 28: THE PARTRIDGE FAMILY - 'Gallery' 1971 David Cassidy (Photo by ABC Photo Archives/ABC via Getty Images)
NEW YORK, NY - JANUARY 10: Musician David Cassidy performs at BB King on January 10, 2015 in New York City. (Photo by Debra L Rothenberg/Getty Images)
UNITED STATES - JULY 28: THE PARTRIDGE FAMILY - 'Gallery' 1971 David Cassidy (Photo by ABC Photo Archives/ABC via Getty Images)
TODAY -- Pictured: (l-r) David Cassidy and Danny Bonaduce appear on NBC News' 'Today' show (Photo by Peter Kramer/NBC/NBCU Photo Bank via Getty Images)
HOLLYWOOD, FL - DECEMBER 12: David Cassidy attends Seminole Hard Rock Winterfest Boat Parade 2014 Grand Marshal Reception Honors Flo Rida at Seminole Hard Rock Hotel & Casino ? Hard Rock Cafe Hollywood on December 12, 2014 in Hollywood, Florida. (Photo by Larry Marano/Getty Images)
David Cassidy, singer, actor and musician, in concert at Wembley Arena, London. David Bruce Cassidy is widely known for his role as Keith Partridge in the 1970s musical sitcom The Partridge Family, which led to his becoming one of pop culture's most celebrated teen idols and pop singers of the 1970s. He later had a career in both acting and music. Picture taken 17th March 1973. (Photo by Lloyd/Mirrorpix/Getty Images)
HOLLYWOOD, FL - DECEMBER 12: Sue Shifrin and David Cassidy attend Seminole Hard Rock Winterfest Boat Parade 2014 Grand Marshal Reception Honors Flo Rida at Seminole Hard Rock Hotel & Casino ? Hard Rock Cafe Hollywood on December 12, 2014 in Hollywood, Florida. (Photo by Larry Marano/Getty Images)
UNITED STATES - JULY 28: THE PARTRIDGE FAMILY - 'The Last Howard' 10/27/73 David Cassidy (Photo by ABC Photo Archives/ABC via Getty Images)
TODAY -- Pictured: Musician/actor David Cassidy appears on NBC News' 'Today' show on March 21, 2013 -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
UNITED STATES - JULY 22: THE PARTRIDGE FAMILY - 'The Forty-Year Itch' 11/1971 David Cassidy (Photo by ABC Photo Archives/ABC via Getty Images)
SCHODACK, NY - AUGUST 21: In this handout photo provided by the Schodack Police Department, David Cassidy is seen in a police booking photo after his arrest on charges of felony DWI, driving while intoxicated, August 21, 2013 in Schodack, New York. Cassidy was released on USD 2,500 bail and is scheduled to appear in court September 4. (Photo by Schodack Police Department via WireImage)
COCONUT CREEK, FL - AUGUST 13: Singer David Cassidy performs during the first hand of Real Blackjack 24/7 Seminole Casino Coconut Creek on August 13, 2010 in Coconut Creek, Florida. (Photo by Larry Marano/Getty Images)
TODAY -- Pictured: Musician/actor David Cassidy appears on NBC News' 'Today' show on March 21, 2013 -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
TODAY -- Pictured: (l-r) NBC News' Matt Lauer, David Cassidy, tv host George Oliphant and NBC News' Natalie Morales appear on NBC News' 'Today' show on March 21, 2013 -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
BIRMINGHAM, UNITED KINGDOM - NOVEMBER 09: David Cassidy performs on stage during the UK Once In A Lifetime Tour at LG Arena on November 9, 2012 in Birmingham, United Kingdom. (Photo by Steve Thorne/Redferns via Getty Images)
UNITED STATES - JULY 28: THE PARTRIDGE FAMILY - 'Gallery' 1970 Susan Dey, Jeremy Gelbwaks, David Cassidy, Shirley Jones, Danny Bonaduce, Suzanne Crough (Photo by ABC Photo Archives/ABC via Getty Images)
NEW YORK, NY - JULY 19: Singer David Cassidy performs at BB King on July 19, 2012 in New York City. (Photo by Bobby Bank/Getty Images)
NEW YORK - NOVEMBER 21: David Cassidy performs at the Queensborough Performing Arts Center in Queens on November 21, 2009 in New York City. (Photo by Bobby Bank/WireImage)
NEW YORK, NY - MAY 22: David Cassidy attends 'The Celebrity Apprentice' Season 4 Finale at Trump SoHo on May 22, 2011 in New York City. (Photo by Jim Spellman/WireImage)
LONDON, UNITED KINGDOM - APRIL 12: David Cassidy performs on stage at Hammersmith Apollo on April 12, 2011 in London, United Kingdom. (Photo by Mark Westwood/Redferns)
UNITED STATES - JULY 28: THE PARTRIDGE FAMILY - 'Gallery' 1971 Shirley Jones, David Cassidy (Photo by ABC Photo Archives/ABC via Getty Images)
TODAY -- Pictured: David Cassidy appears on NBC News' 'Today' show (Photo by Peter Kramer/NBC/NBCU Photo Bank via Getty Images)
David Cassidy enter caption here at The Langham Resort on August 8, 2009 in Pasadena, California. (Photo by Steve Granitz/WireImage)
NEW YORK, NY - JULY 19: Singer David Cassidy performs at BB King on July 19, 2012 in New York City. (Photo by Bobby Bank/Getty Images)
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"I want to focus on what I am, who I am and how I've been without any distractions," he said. "I want to love. I want to enjoy life."

The bombshell admission comes after he made headlines during a concert in California over the weekend. Cassidy's fans became concerned about his health after he repeatedly struggled to remember song lyrics.

The past couple of years have also been quite tumultuous for the former teen heartthrob. His wife, Sue Shifrin-Cassidy, filed for divorce in 2014 after 23 years of marriage. He also had several DUI arrests between 2010 and 2014, which ended with a stint in rehab. In 2015, he filed for bankruptcy and was also charged for a hit-and-run.

While he's most well-known for his role on "The Partridge Family," Cassidy has made cameo appearances in other TV shows over the years, including "CSI" and "Celebrity Apprentice."

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