The happy couple tied the knot over the weekend in California, according to People and E! Online.
The intimate wedding ceremony was "very romantic", a source told People.
Both outlets report Pratt's son Jack, 6, and Schwarzenegger's parents Maria Shriver and Arnold Schwarzenegger were in attendance.
Other celebrity guests at the wedding included Rob Lowe and Guardians of the Galaxy director James Gunn, according to E!.
USA TODAY has reached out to Pratt's representative for comment.
Pratt, 39, rose to fame in NBC's series Parks and Recreation before movie stardom came calling, thanks to roles in the Guardians and Jurassic World franchises. Schwarzenegger, 29, is an author and lifestyle blogger.
Pratt popped the question in January, months after the pair had people guessing if they were an item when they were spotted together last June. The twosome were then spotted on a church date in August and visited a winery with Pratt's brother the following month.
After announcing their engagement, the couple made their red carpet debut at the April premiere of Avengers: Endgame at the Los Angeles Convention Center.
Pratt was previously married to Anna Faris, 42, from 2009 to 2018. They share a son together, Jack.
"We still have love for each other, will always cherish our time together and continue to have the deepest respect for one another," Faris posted on social media at the time of their separation.