America's favorite Hollywood couple has split, and we want to know why. After seven years of marriage, and two kids later, the couple made an announcement earlier this week about their decision to part ways. But why have they decided to seperate? Rumor has it that it was due to Ryan's infidelity.

The Bosh has reported that Ryan has been involved with his Stop Loss co-star, Abbie Cornish. The two became close while filming in Austin, TX. One night, they were spotted getting cozy over dinner at a restaurant called Kenichi. A spy for the Enquirer claims "They asked the restaurant staff to pull curtains around their table, so no one could see them." Pink Is The New Blog reports another witness to the dinner stating "We sat two tables away from Phillippe and an extremely attractive blonde (not Reese). The couple had a partition placed around their table soon after they arrived, but we could still see their legs intertwined under the table. As we left, we could see them clearly making out behind the partition."

The Enquirer reports that Reese found out about the affair after reading messages to Cornish on her husband's BlackBerry, which he left in the bathroom.