Jon Hamm has been promoting the last episodes of Mad Men for several weeks now. Something strange happened though – his partner Jennifer Westfeldt hasn’t been to any of the Mad Men events. It’s strange in the sense that, historically, Jennifer was almost always at Hamm’s side for every major (and many minor) events. Page Six’s source said last week that Westfeldt was MIA because someone in her family was sick. I also theorized (to myself) that Westfeldt wanted to give Hamm some space following his stay in rehab, perhaps to let him figure out who he was now that he’s sober. But The Daily Mail/In Touch Weekly says something else was going on. Their sources say Jennifer dumped him. Whoa.

It’s the end of an era for Jon Hamm, whose AMC series Mad Men has come to a close after seven seasons. Now comes word that the 44-year-old actor’s 18-year-long relationship with actress Jennifer Westfeldt has also reached an end.

(DailyMail.com reached out to the actor’s representative on Wednesday, but did not receive an immediate response.)

Jon, who recently completed a 30-day stay for alcoholism at Silver Hill Hospital in New Canaan, Connecticut, was reportedly given the boot before he entered the treatment facility. And according to In Touch Weekly, Jennifer, 45, broke up with Hamm due to a lack of commitment on his part.

‘She told it was over before he checked into rehab,’ a source told the publication. ‘She was tired of waiting for a commitment from Jon.’

The break-up was apparently amicable and the two remain on friendly terms, In Touch reported. Jon, who completed his rehab program sometime in late March, continues to hold a torch for the blonde Kissing Jessica Stein star and wishes to rekindle the relationship. Despite the belief that neither one wanted to get married, Jennifer did want the wedding ring, according to In Touch.

‘Jennifer wants a life that Jon can’t give her. Jennifer was tired of it,’ the source said. ‘People are happy for her and hoping she never takes him back.’

[From The Daily Mail]

Eh. IF they did break up and IF the breakup happened before Hamm went to rehab, why not go with the obvious explanation? That Jennifer dumped him as some kind of tough-love because he was drinking too much and she didn’t want to watch booze destroy his life? That she thought breaking up with him would be the wake-up call he needed to get his life in order? Doesn’t that explanation make more sense?

Alternate theory: Hamm cheated on her while he was a boozy mess and she finally had enough of that.

Oh, and late last night, Jon’s rep issued this statement: “The story that appeared in this week’s edition of In Touch magazine is not true. The only gentleman Jennifer visited regularly in Connecticut was Jon, while he was in rehab. They continue to ask for the public’s understanding and sensitivity during this challenging time.” Is ALL of it untrue? Like, let’s parse it – it’s untrue because In Touch gave the wrong reason for the split? Eh.

Photos courtesy of WENN.