Pratt and Schwarzenegger were first spotted out together on Father’s Day last year when they had a picnic in the park in Santa Barbara after meeting through Katherine's mom Maria Shriver.
“They’re both serious about the relationship and hopeful for the future,” a source close to the couple recently told PEOPLE. “Chris doesn’t just date to date, and neither does Katherine. She’s very excited.”
“Chris and Katherine are very happy together,” added the source. “They’re very compatible and have a lot in common.”
“Sweet Katherine, so happy you said yes! I’m thrilled to be marrying you. Proud to live boldly in faith with you. Here we go! 💍🙏♥️,” he captioned a photo of himself cuddling up to Schwarzenegger, whose engagement ring was front and centre.