The Guardians of the Galaxy star (39) has proposed to Katherine, the daughter of Arnold Schwarzenegger and Maria Schriver, just one month after confirming the relationship.
Pratt made the announcement on Instagram, with a photo of the couple embracing and Katherine's ring on show, with the caption, "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!”
Pratt's divorce from actress Anna Faris, after eight years of marriage, was confirmed in November and he is believed to have been dating Katherine for around seven months, after he split from his wife.
In a post in December, Pratt marked Schwarzenegger’s 29th birthday by sharing a picture collage of them together.
He captioned the post: “I’ve cherished our time together. Thrilled God put you in my life. Thankful for the laughs, kisses, talks, hikes, love and care.”
The 39-year-old actor, whose divorce from actress Anna Faris was confirmed in November, has announced his engagement to Katherine Schwarzenegger.
Pratt and Faris married in 2009 and split in 2017. They have a six-year-old son together.
Faris is currently dating Michael Barrett and previously spoke about how she and Chris 'work really hard' to be supportive of each other for the sake of their son, Jack.