The Boy Meets World actress has also revealed that she is now an official college graduate.
Fishel broke news of her engagement via her Tumblr page, and also confirmed her recent graduation from college.
"I am officially a college graduate! I took my last two undergraduate finals today and I am so happy, relieved, and proud," she wrote.
"And that is how I met my fiancé."
The 31-year-old star went back to college four years ago, and it was through her studies and her job as a maths tutor that Fishel met her fiancé Tim Belusko.
Fishel is currently working on the upcoming Girl Meets World Disney sequel, where she will reunite with former co-star Ben Savage.