Their split has shocked many of their fans because they of how often Kaley Cuoco gushed about her marriage to Ryan Sweeting, and many think the sudden news is the result of some potential cheating. 

New Details About Kaley Cuoco & Ryan Sweeting's Split Revealed

People Magazine revealed Sept. 28 that the actress officially filed for divorce from her husband of 21 months citing irreconcilable differences. In the filing, Cuoco also noted the couple's separation date as Sept. 3 and revealed that they had signed a prenuptial agreement in Nov. 2013, one month before their wedding.  

However, the filing comes just one week after the actress appeared on Watch What Happens Live, where she gushed about the relationship between her husband and her co-star and ex, Johnny Galecki, which has caused some to wonder if something drastic happened over the course of the week which suddenly changed things. 

3 Things That May Have Hinted Kaley Cuoco & Ryan Sweeting Were Headed For A Split

In the comments section on the People article, some fans have even suggested that perhaps Cuoco caught her husband cheating on her-which would explain the sudden change from gushing about her husband on Monday, to announce she was divorcing him by Friday.  

"We;;...could she have found him in bed with another guy or perhaps the maid? that would do it for me. Pre-nups are always 100% necessary. BTW...why marry, at all?" one fan commented. 

"With all his downtime while injured he probably met someone online. She found out. BOOM! DIVORCE!" another wrote. 

"Still think something happened & she just picked an arbitrary day to list as the date of separation. You don't go from love in your eyes to coldly announcing a divorce in a week," another added.  

However, another noticed that Cuoco's still being close to Galecki may have been an issue as well which could have led to the break-up. 

"Something caused this to move so quickly...just my own thought but I wonder if this has anything to do with her ex and co-star, Johnny Galecki? She's always gushing over how much she loves him and how close they are...maybe they still have feelings for each other," the fan wrote.