Jon reportedly checked into Connecticut’s Silver Hill Hospital at the end of February, just days before the premiere of the final season of ‘Mad Men’, where he completed their 30-day alcohol abuse program.
His stint in rehab comes as his ‘Mad Men’ character Don Draper has been going through similar personal struggles in the show, after the character was asked to take a leave of absence from his job to deal with his drinking.
Meanwhile, the second half of the seventh and final series of ‘Mad Men’ is returning to screens in the US on 5 April, before airing in the UK on Sky Atlantic days later on 9 April.
The final episode of the show has already been filmed, with Jon revealing that he broke down in tears as the director yelled “cut!” for the final time, telling Emmy magazine: “Everyone did.”
Rehab Celebs
Rehab Celebs(01 of10)
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Who? Zac EfronWhere? UndisclosedWhen? 2013Why? Cocaine addictionAfter reports surfaced that the former 'High School Musical' star had completed two stints in rehab, Zac took to Instagram to thank fans for their support, writing: "Hey guys! Just returned from an incredible trip to Peru with my dad and wanted to thank you all for your support these past few weeks...means the world to me. Love you guys! - Z." (credit:WENN)
Rehab Celebs(02 of10)
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Who? Kelly OsbourneWhere? UndisclosedWhen? On seven different occasionsWhy? PainkillersKelly says she finally faced her demons after realising nobody wanted to work with her. “What changed for me was looking around and seeing that nobody liked me or wanted to work with me,” she told Cosmopolitan magazine in 2013. (credit:WENN)
Rehab Celebs(03 of10)
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Who? Ben AffleckWhere? Promises, CaliforniaWhen? 2001Why? AlcoholismAfter the actor checked himself into rehab in 2001, his publicist said: "Ben is a self-aware and smart man who has decided that a fuller life awaits him without alcohol. He has chosen to seek out professional assistance and is committed to traveling a healthier road with the support of his family, friends and fans." (credit:WENN)
Rehab Celebs(04 of10)
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Who? Britney SpearsWhere? Promises, CaliforniaWhen? 2007 (amongst other times)Why? UndisclosedBritney has never revealed the reason behind her stints in rehab, which led to her losing custody of her two sons as well as being placed under the conservatorship of her father. (credit:WENN)
Rehab Celebs(05 of10)
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Who? Chris KleinWhere? Cirque Lodge, UtahWhen? 2010Why?AlcoholThe 'American Pie' star checked into rehab for a 30-day alcohol treatment program following an arrest for drink driving - his second in just over five years. He later admitted if he hadn't got sober, 'I would have died'. (credit:WENN)
Rehab Celebs(06 of10)
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Who? Lindsay LohanWhere? VariousWhen? 2007 (three times), 2010 (twice), 2013 Why? Alcohol and drugsAfter her most recent stay in rehab, Lindsay Lohan told Oprah Winfrey: “I feel whole again. And I have such a desire to want to keep this feeling and stay this way. And I’m willing to do whatever it takes…And I really want to be on set, like, that feeds me.” (credit:WENN)
Rehab Celebs(07 of10)
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Who? Philip Seymour HoffmanWhere? UndisclosedWhen? May 2013Why? Substance abuseAfter a ten day stint in rehab, the actor told TMZ: "It started slowly with prescription pills, and recently escalated to snorting heroin." (credit:WENN)
Rehab Celebs(08 of10)
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Who? Eva MendesWhere? Cirque Lounge, UtahWhen? 2008Why? Anxiety and stressEva denied rumours that she entered rehab to treat cocaine use. Her rep said that the actress had "made a positive decision to take some much-needed time off to proactively attend to some personal issues that, while not critical, she felt deserved some outside professional support." (credit:WENN)
Rehab Celebs(09 of10)
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Who? Matthew PerryWhere? UndisclosedWhen? 1997, 2001 and 2011Why? Prescription pills and alcoholAfter two previous spells in rehab, the former 'Friends' star returned again in 2011 as a proactive measure. He said at the time: "I'm making plans to go away for a month to focus on my sobriety and to continue my life in recovery. Please enjoy making fun of me on the World Wide Web.' (credit:WENN)
Rehab Celebs(10 of10)
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Who? LeAnn RimesWhere? UndisclosedWhen? August 2012Why? Anxiety and stressThe American singer checked into rehab one day after her 30th birthday, saying at the time: "This is just a time for me to emotionally check out for a second and take care of myself and come back in 30 days as the best 30-year-old woman I can be. (credit:WENN)