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.
