After dating for about a year, Jamie Lynn Sigler and Cutter Dykstra got engaged on Monday (January 28).

The "Sopranos" star tweeted a photo of herself sporting a diamond engagement ring in a car with her Washington Nationals player fiancée.

Both sides of the happy couple commented on the photo with Jamie tweeting, "So this just happened..." and Cutter gushing, "She said yes!!" Later, the bride-to-be added, "Thank you so much for all the love everyone. I am so happy and more importantly lucky ! @CutterDykstra"

A source tells Us Weekly, "Jamie couldn't be happier. Cutter is the perfect guy for her. Although they have only been together for a year, they both know that this is it for both of them. They are both on cloud nine as are their families and friends."

Previously, the 31-year-old actress was married to her manager, A.J. DiScala. This will be Cutter's first marriage.