Following a whirlwind romance over the summer, Chris Pratt asked Katherine Schwarzenegger to marry him.

Pratt, 39, announced the news via Instagram early Monday morning with a photo of himself embracing Schwarzenegger who was proudly wearing her huge engagement ring.

Pratt and Schwarzenegger's relationship first heated up 10 months after the actor's separation, when the couple was spotted out together on Father's Day having a picnic in the park in Santa Barbara. They were later seen on dates around Los Angeles and outings with Pratt's six-year-old son Jack in tow.

Though the pair have only been together since the summer, they quickly knew they were meant to be.

“They're both serious about the relationship and hopeful for the future,” a source said.

“Chris and Katherine are very happy together,” added the source. “They're very compatible and have a lot in common.”

The engagement comes two months after Pratt and Faris settled their divorce. They each waived their right to spousal support but they'll continue to co-parent Jack.