They might no longer be on the small screen together, but it looks like January Jones and Jon Hamm are still rather tight. In fact, there's a new report that says the Hollywood actress might be the reason Hamm broke up with longtime girlfriend Jennifer Westfeldt this past summer.

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According to Celebrity Dirty Laundry, Jones and Hamm have supposedly been keeping their relationship well hidden from the paparazzi, but sources say that they are spending a lot of time with each other during date nights at restaurants on the outskirts of Los Angeles. What's more, they are supposedly talking to each other by phone every day and have also managed to sneak inside each other's homes while keeping the paparazzi at bay.

The site goes on to say that after Hamm completed his rehab stint for alcohol addiction earlier this year, he turned to Jones rather than Westfeldt for the emotional support that he needed.

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A source close to the former Mad Men stars dished, "January was happy to lend and ear and she also reached out to Jon during a difficult split from Will Forte around the same time."

The insider added, "Now that Jon and January have spent so much time together both on and off-screen, it's pretty obvious that they are much more to each other than just co-workers."

So far, neither Jones nor Hamm have made any comments about the report.