See photos of David Cassidy of "The Partridge Family" through the years.
David Cassidy performs his final touring concert at B.B. King Blues Club & Grill in Manhattan on March 4, 2017.
David Cassidy attends Hollywood Today Live at W Hollywood on Dec. 14, 2016, in Hollywood, California.
David Cassidy performs at the B.B. King Blues Club & Grill in Manhattan on Jan. 10, 2015.
David Cassidy attends Seminole Hard Rock Winterfest Boat Parade 2014 Grand Marshal Reception Honors Flo Rida at Seminole Hard Rock Hotel and Casino Hard Rock Cafe Hollywood on Dec. 12, 2014, in Hollywood, Florida.
David Cassidy and Miss Florida USA Ashleigh Lollie attend the Seminole Hard Rock Winterfest Boat Parade 2014 Grand Marshal Reception Honors Flo Rida at Seminole Hard Rock Hotel and Casino Hard Rock Cafe Hollywood on Dec. 12, 2014, in Hollywood, Florida.
NBC News' Savannah Guthrie, Natalie Morales with David Cassidy on NBC's 'Today' show on March 21, 2013.
David Cassidy appears on NBC News' 'Today' show on March 21, 2013.
David Cassidy performs during the UK Once In A Lifetime Tour at LG Arena on Nov. 9, 2012, in Birmingham, England.
David Cassidy is flanked by Bruce Johnston, left, and Mike Love of the Beach Boys backstage during the IEBA and CMA Present Hall of Fame and SRO Awards Dinner at IEBA Conference Day 3 at the Sheraton Nashville Downtown on Oct. 9, 2012, in Nashville.
David Cassidy and Michael Douglas attend the 5th annual New Jersey Hall of Fame induction ceremony at the New Jersey Performing Arts Center on June 9, 2012, in Newark.
David Cassidy and Marlee Matlin attend 'Celebrity Apprentice' Season 4 finale at Trump SoHo on May 22, 2011.
David Cassidy performs on stage at Hammersmith Apollo on April 12, 2011, in London.
David Cassidy seen on location for 'Celebrity Apprentice' on the streets of Manhattan on October 19, 2010.
Singer David Cassidy performs during the first hand of Real Blackjack 24/7 at the Seminole Casino Coconut Creek on Aug. 13, 2010, in Coconut Creek, Florida.
David Cassidy performs at the Queensborough Performing Arts Center in Bayside, Queens, on Nov. 21, 2009.
David Cassidy arrives at the 2009 Disney-ABC Television Group Summer Press Tour at The Langham Resort on August 8, 2009, in Pasadena, California.
David Cassidy performs at the "The Ultimate Idols" concert with Davy Jones at St. George Theatre on Sept. 13, 2008, on Staten Island.
Katie Cassidy and David Cassidy at the 9th annual Family Television Awards held at the Beverly Hilton Hotel on Nov. 28, 2007, in Los Angeles.
David Cassidy promotes his autobiography, "David Cassidy - Could It Be Forever? My Story," on March 7, 2007, at Waterstones in London.
David Cassidy during Property From The Career Of David Cassidy To Hit The Auction Block Press Conference on Nov. 28, 2006, at Hard Rock Cafe New York.
David Cassidy and Danny Bonaduce during MTV Networks TCA on July 23, 2004 at Century Plaza in Los Angeles.
David Cassidy during MTV Networks TCA on July 23, 2004, at Century Plaza in Los Angeles.
Entertainer David Cassidy waves to the crowd after singing the national anthem before the start of Game 3 of the NL division playoff series between the Florida Marlins and the San Francisco Giants on Oct. 3, 2003, in Miami.
David Cassidy, of "The Partridge Family" fame, Feb. 7, 2001.
David Cassidy and third wife Sue Shifrin (they were married from 1991 to 2016) on Feb. 7, 2001.
David Cassidy and Sheena Easton, Dec. 2, 1999.
David Cassidy at the 1999 Wellness Center Golf Tournament in Los Angeles.
David Cassidy during VH1's Fairway to Heaven in 1999 at Las Vegas Country Club in Nevada.
David Cassidy and Alice Cooper during the 1998 Fairway to Heaven Golf Tournament in Las Vegas, Nevada.
David Cassidy, left, and brother Patrick sit on the stage of EFX at the MGM Grand in Las Vegas, Tuesday, Nov. 11, 1997. Patrick took over David's role for a week in EFX production in Las Vegas.
Entertainer David Cassidy, star of the theatrical show, "EFX," sings during the show's 1000th performance, Tuesday night, July 22, 1997, at the MGM Grand in Las Vegas.
David Cassidy at rehearsal photos in Manhattan Aug. 4, 1993. He took over a role in the Broadway musical "Blood Brothers" on Aug. 16, 1993 when his brother Shawn Cassidy also joined the cast in the role of his on-stage "blood brother."
Comedian Gilbert Gottfried, Rhonda Shearer and musician David Cassidy attend First Annual B Minus Movie Awards on May 13, 1993 at Bruno's in Hollywood, California.
David Cassidy, left, and British singer Cliff Richard arrive at the National Theatre in London, May 31, 1987 to attend an 80th birthday tribute to the great British actor Lord Olivier.
Actor and singer David Cassidy embraces his second wife, Meryl Tanz who was a horse breeder from South Africa, in Easton, Maryland, on Dec. 15, 1984. They divorced in May 1988.
Actress Shirley Jones poses for a family portrait with her children at a testimonial dinner in Los Angeles, Sunday, Oct. 8, 1979, honoring her as the National Leukemia Broadcast Council's National Chairwoman. From left are: Shaun Cassidy, Shirley, David Cassidy, Patrick Cassidy and Ryan Cassidy. Ms. Jones was formerly married to the boys' father, actor Jack Cassidy.
David Cassidy in "The Last Howard" episode of The Partridge Family on Oct. 27, 1973.
Pop singer David Cassidy and actress Kay Lenz leave the "Little Church of the West" after their wedding in Las Vegas on April 3, 1977. The marriage was delayed 15 minutes because Cassidy forgot the marriage license. They divorced on Dec. 28, 1983, and had no children.
Hordes of screaming girls are separated from their idol David Cassidy by a pane of glass at the Thames television studio in London on May 25, 1974.
This 1972 file photo shows singer and teen idol David Cassidy.
David Cassidy and Barbara Sigel in the "Beethoven, Brahms, and Partridge" episode of The Partridge Family on Sept. 29, 1973.
Teen pop idol David Cassidy performs at Madison Square Garden, on March 11, 1972.
An Oct. 8, 1971 photo of David Cassidy from "The Undergraduate" episode of "The Partridge Family."
Actor Jack Cassidy, his wife, actress singer Shirley Jones, and son David, arrive at the Palladium in Hollywood May 9, 1971, for the annual Emmy Awards show. Cassidy was a nominee for best actor.
A July 28, 1970, photo of Danny Bonaduce, Susan Dey, David Cassidy, Suzanne Crough, Jeremy Gelbwaks, Shirley Jones from "The Partridge Family."