Did Amanda Seyfried and Thomas Sadoski cheat on their respective exes? Well, new reports claimed that Seyfried and Sadoski's secret affair to be blamed for their respective breakup and divorce.

Amanda Seyfried shocked the entertainment realm in September when she broke up with her boyfriend of two years, Justin Long. While Thomas Sadoski made headlines when he filed for divorce from his wife, Kimberly Hope, in October following an 8-year marital bliss. It may all be just a mere coincidence but some showbiz insiders said that the breakup and divorce were caused by the alleged hook-up of "The Way We Get By" costars.

Insiders also revealed that sparks flew instantly between Thomas Sadoski and Amanda Seyfried, who went to New York to make her debut in an off-Broadway play. According to Celeb Dirty Laundry, those sparks weren't only on-stage as they reportedly started a "cozy off-stage relationship," which led to the speculations of a romance between Seyfried and Sadoski.

"There was an obvious attraction between Thomas and Amanda... it wasn't long before romance rumors were swirling," a source said, as per Classicalite. "She broke up with Justin to be with him."

Now, Amanda Seyfried, 30, and Thomas Sadoski, 39, are reportedly keeping their relationship under wraps to avoid negative publicity until Sadoski's divorce is final. However, reps for both actors have denied any affair.

Meanwhile, Amanda Seyfried's 37-year-old ex-boyfriend Justin Long, who had dated Drew Barrymore for three years before breaking up because Barrymore was dating ABC executive Cort Cass on the side, is allegedly not taking the breakup so well. In a recent interview with James Corden, the "Tusk" actor revealed that he was seriously thinking about becoming an Uber driver, as per SeattlePI.

"I thought Austin would be a little bit [better] because people don't really care [about celebrity] as much," Long told late night host Corden. "I went for a ride-along with a friend of mine who is an Uber driver... Once in a while people would get in and they would look at me and see that I was an actor. But we had one guy that we drove for, like, 20 minutes and there was no mention of me. He was just talking about whatever and at the end of the ride he got out and he goes, 'Oh hey, by the way, are they making a 'Jeepers Creepers 3′?' and I said, 'Yeah, I think they are', and like totally non-plussed, he said, 'Oh, OK.'"