In 2006, season two contestant Romeo Miller withdrew from Dancing With The Stars due to an injury and was replaced by his father Master P.
Pro dancer Derek Hough during season six in 2008 pulled his neck during rehearsal and missed a week of dancing.
Derek during season seven also blacked out during rehearsal after tripping and landing on the back of his head.
Season seven also saw the departure of Misty May-Treanor after she was injured during practice and ruptured her Achilles tendon.
Rehearsal injury: Misty May-Treanor is shown with host Tom Bergeron in October 2008 as she revealed rupturing her Achilles tendon during practice on Dancing With The Stars
Brooke Burke also severely bruised her foot during season seven during camera blocking when she landed hard doing a front flip with pro partner Derek.
Susan Lucci during season seven fractured two bones in her foot, but remained in the competition.
Nancy O’Dell withdrew from season eight due to a torn meniscus, along with Jewel who fractured both her tibias just before the season premiere.
Steve-O also suffered a pulled back muscle during dress rehearsal in season eight and was unable to perform the salsa live.
Former House Majority Leader Tom DeLay during season nine withdrew from the competition in week three after injuring his foot during rehearsals before the premiere.
Billy Dee Williams was forced to withdraw from season 18 due to a chronic back problem.
Early exit; Billy Dee Williams withdrew early from season 18 due to a chronic back problem
Season 21 saw two contestants drop-out midseason due to health issues with Kim Zolciak departing after suffering a mini-stroke and Tamar Braxton withdrawing after doctors discovered pulmonary embolisms in her lungs.
Pro dancer Mark Ballas during season 22 injured his back during rehearsal and was unable to perform for a week with his partner, UFC fighter Paige VanZant.
Pro dancer Sharna Burgess during season 23 injured her knee during rehearsal with James Hinchcliffe and was out for two weeks.
Pro dancer Maksim Chmerkovskiy during season 24 suffered a calf muscle injury during rehearsal with Heather Morris and was replaced by dance troupe member Alan Bersten during a four-week recovery period.
Christie Brinkley broke her arm during practice five days before the season 28 premiere and was replaced by her daughter Sailor Brinkley-Cook.
Ray Lewis was forced to withdraw from season 28 after suffering three torn tendons in his foot during practice ahead of week three Movie Night. He re-aggravated an injury from 2010 while playing football for the Baltimore Ravens.
Stepping in: Christie Brinkley broke her arm during practice five days before the season 28 premiere of DWTS and was replaced by her daughter Sailor Brinkley-Cook
Country singer Lauren Alaina during Halloween Week of season 28 revealed that she’d been dancing with ‘four hurt ribs,’ having broken one during the first week of the show, and noting the others ‘don’t feel great’.
The Bachelorette star Kaitlyn Bristowe suffered an ‘ankle injury’ during week two of season 29, but still performed with pro partner Artem Chigvintsev. She later revealed during Disney Night that she was suffering from tendonitis and shin splints.
Pro dancer Cheryl Burke announced on September 26, 2021, that she had tested positive for COVID-19 before the second episode of season 30. Her celebrity partner Cody Rigsby tested positive for the coronavirus a few days later and they continued competing together, but dancing in separate rooms.
Olympic gymnast Suni Lee during season 30 also bolted after her performance on Queen Night to throw up, but rallied to stay in the competition.
Judge Derek Hough missed the season 30 finale after being diagnosed with a breakthrough case of COVID-19 and was replaced by his sister Julianne.
Pro dancer Daniella Karagach missed Elvis Night after testing positive for COVID-19 along with four crew members after the season 31 premiere in September 2022 on the Disney+ streaming service.
Selma Blair, who revealed in 2018 that she had been diagnosed with multiple sclerosis, withdrew from the competition during season 31 due to ‘excessive bone trauma’ related to her chronic illness.
Valentin Chmerkovskiy missed Halloween Night on season 31 after testing positive for COVID-19 and Mark Ballas performed during the episode after missing rehearsal due to a ‘flare-up’ in his lower back.
Derek was scheduled to perform during the season 31 live finale with his fiancee Hayley Erbert, but she suffered a shoulder injury the day before while preparing and was unable to dance with him.
Coronavirus infection: Pro dancer Cheryl Burke announced on September 26, 2021, that she had tested positive for COVID-19 and her pro partner Cody Rigsby tested positive a few days later forcing them to dance in separate rooms